# RoomScore Full AI Crawler Export Last updated: 2026-05-18 This file contains the homepage, pillar pages, and high-priority docs in plain text form for AI crawlers that prefer expanded content over a compact llms.txt index. # Homepage Source: https://roomscore.tech/ Conference Room Audio Testing Tool for iPhone - RoomScore RoomScore Login Start Free Room Audit RoomScore Conference room audio testing tool Know if your room is helping or hurting your meetings. Stop guessing which rooms need acoustic treatment. RoomScore gives facilities and AV teams professional-grade audit data in minutes using just your phone. 5-minute scan No expertise required Prioritize upgrades Start Free Room Audit See how it works Available on the App Store in the U.S. and Canada only. Start with the conference room audio testing tool , go deeper with the RT60 measurement app for iPhone , or standardize rollouts with facilities room audit software . 159 Rooms scanned 88 Median score 0.44s Median RT60 Real RoomScore app screen from a classroom audit. I built RoomScore to stop teams wasting money on hardware that doesn't fix the actual problem. Ryan, Founder How It Works Scan. Score. Act. Step 01 Scan the room, capture the setup. A guided intake captures room name, location, geometry, photos, and the environmental signals needed for a consistent baseline. RoomPlan geometry, required photos, and room metadata are collected in one repeatable workflow. Noise and echo checks validate the room before RoomScore turns the scan into a result. The killer feature Audio Coverage Mapping See exactly where audio drops off. RoomScore turns a room walk into a heatmap that shows where remote callers can hear you clearly and where the system fails. Visual proof that the mic reaches the back row, or evidence that it does not. Coverage maps justify upgrades before money is spent on the wrong fix. Step 02 Scientific metrics, simplified. Get the precise RT60 and noise floor data you need without an acoustics degree. RoomScore translates technical measurements into a professional baseline your team can use immediately. 0.47s RT60 Target Pass Noise Floor Translation: echo clears fast enough for clear, professional-grade calls. Step 03 Turn the score into a plan. RoomScore keeps the measured physics immutable, then turns them into prioritized actions, budget scenarios, and clear next steps. Measurements stay immutable Recommendations explain the lift Scenarios align to budget Investment Scenarios Minimal Recommended Premium Total: $2,800-$4,200 Expected: Acoustic 74 -> 85, AV Fit 58 -> 76 Balanced upgrades that lift clarity and conferencing coverage without overbuilding. Expected lift $2,800-$4,200 Acoustic 74 → 85 AV Fit 58 → 76 4 m2 fabric panels (full wall treatment) Logitech Rally Bar Mini + 2 expansion mics Cable management and lighting adjustment Total: $600-$1,000 Expected: Acoustic 74 -> 81, AV Fit 58 (unchanged) Quick wins with minimal spend. Expected lift $600-$1,000 Acoustic 74 → 81 AV Fit 58 → 58 2.4 m2 acoustic panels (rear wall + ceiling) Furniture repositioning to reduce glass reflections Door sweep installation to reduce HVAC noise Total: $6,500-$9,000 Expected: Acoustic 74 -> 92, AV Fit 58 -> 88 Flagship-ready upgrades with full treatment and enterprise AV. Expected lift $6,500-$9,000 Acoustic 74 → 92 AV Fit 58 → 88 6 m2 treatment (walls + 2 m2 ceiling cloud) Shure MXA920 ceiling array + Neat Bar Pro Professional installation and room calibration Add acoustic treatment before replacing hardware. Echo is the first limiter, so panels create the fastest lift for the least spend. Expand microphone reach only after the room is stable. AV upgrades matter most once the baseline acoustics are controlled. Explain every recommendation in plain language. Teams can see what was measured, what was inferred, and why the plan is defensible. Measured physics drive the plan. Analysis adds context, not new measurements. Portfolio See the rooms that need attention first. Track completion by site, spot rooms trending down, and understand your average score across the portfolio without opening a spreadsheet. Portfolio health shows where your room estate is stable, slipping, or already critical. The room list becomes the action queue for what to scan next and what to fix first. Portfolio trend Average score 73 Healthy rooms 2 Critical rooms 2 Community Benchmarks See how your rooms compare. Benchmark your facility against global averages using our anonymized live dataset. WORKSPACE AUDITED 25,000+ sq. ft. Live Dataset See fresh community progress, contribution totals, and the benchmark base your rooms are being compared against. Health Trends Track how rooms improve over time. Measure again after treatment, compare against peer spaces, and show whether changes moved the score in the right direction. Benchmark pulse 159 scans Median 88 Privacy Guard Benchmarking without exposing room details. Anonymous measurements build the dataset while room names, location details, and sensitive context stay out of the shared benchmark layer. PRIVACY-FIRST ARCHITECTURE Accurate. Private. Professional. RoomScore processes acoustic measurements locally on-device so sensitive meeting-room conversations are not transmitted or stored in the cloud. IT and AV teams get defensible room data without sacrificing privacy. Measurement Credibility Phone-based measurement, with professional discipline. RoomScore uses industry-standard acoustic physics, then enforces strict quality gates. The app would rather reject a scan than show a weak score. RT60 decay (T20 fit) -5 dB to -25 dB window T20 fit window shown in dashed line. R² threshold 0.75 Noise spread cap 24 dB Quiet window cap 18 dB Clipping reject Strict Method (physics-first) T20 decay analysis RT60 is computed from the -5 dB to -25 dB decay window, then extrapolated to full decay. Three-clap median Three captures per room, median value reported to reduce variance. 150 Hz high-pass filter Removes low-frequency HVAC rumble to focus on speech-band energy. C50 speech clarity Clarity index is computed alongside RT60 for intelligibility context. Quality gates (auto reject) R2 fit threshold Measurements with R2 below 0.75 are rejected. Noise stability checks Ambient noise spread must stay within 24 dB, with a quiet window within 18 dB. Device stability Gyroscope + accelerometer detect movement and prompt a retry. Clipping detection Overloaded microphone signals are rejected before scoring. Screening-grade, not certification. RoomScore is validated in internal testing against reference tools and is designed for portfolio screening, prioritization, and budgeting. For certification or compliance work, use calibrated Class 1 meters. Physics-based Measurements are immutable Expert intelligence adds context Benchmark Roadmap What unlocks as benchmarks grow. RoomScore works offline from day one. Community features unlock as scan milestones are reached. Benchmark growth milestones Launch 100 500 1,000 Launch Available now Core measurement + scoring Echo, noise floor, speech clarity, equipment fit, AI-assisted recommendations, PDF export, community score statistics, equipment performance rankings. Works offline. Zoom Beta Zoom Rooms import Connect your Zoom account to import rooms, sites, and equipment. Start scans directly from your Zoom Rooms inventory. Zoom Coming soon Auto-dial coverage testing Dial your Zoom Room into a test call automatically. Walk the room while RoomScore captures real call quality from the room's AV system. 1,000 scans Planned Outcome and spatial research Longitudinal insights and treatment outcome validation. Guides Conference room audio, explained. Short, practical guides on echo, RT60, noise floor, and coverage testing. Browse the full guide library, including Zoom Rooms, Shure/Logitech/Neat deployment checklists, and the RT60 calculator. Need the workflow instead of the guide? Start with the conference room audio testing tool , the RT60 measurement app for iPhone , or facilities room audit software . Diagnostics Conference call audio problems Symptoms, root causes, and fast checks. Read guide → Echo Why does my conference room echo? How reflections and materials drive echo. Read guide → RT60 What is RT60? Reverberation time, measured simply. Read guide → Noise Meeting room noise floor Background noise and speech clarity. Read guide → Testing How to test conference room audio Quick checks vs. full measurements. Read guide → Coverage Audio coverage mapping See how well voices carry across the room. Read guide → Zoom Zoom Rooms + RoomScore Connect inventory and test coverage. Read guide → Early Access Why contribute early? The faster benchmarks grow, the faster your rooms gain context. Milestones unlocked by contribution Launch 100 500 1,000 Your benchmarks get better faster At 100 community scans, score statistics unlock. At 500, equipment rankings appear. The sooner you contribute, the sooner your rooms have context. Shape the standards The first 1,000 scans define what "good" looks like. Your rooms help set the baseline everyone compares against. Priority feedback We run quarterly surveys with active contributors. You help decide which features to prioritize. Start Free Room Audit Privacy by Design Built-in privacy, no tiers. Anonymous measurements: Echo, noise, volume, equipment, and room metrics power benchmarks without identifiers. No room identifiers: Names, sites, and buildings stay in your account. Photos are required for AI analysis: Deleted from cloud after processing and screened on-device before upload. Support Direct support. Replies come from the founder. RoomScore is live on the App Store in the U.S. and Canada only. Contact Questions, support, feedback, ideas, or more info — send a note here. Replies come from the founder. Name Email * Topic Support Question Feedback Idea App access Other Region (for app access) * Select region US/Canada UK/Ireland EU (other) APAC LATAM Middle East / Africa Other Country (optional) Rooms to evaluate Select range (optional) 1-5 6-20 21-100 100+ Target timeline Select timeline (optional) Now This quarter Next quarter Exploring Message * Send message Typical response time: 1 business day. What devices are supported? iPhone 12 Pro or later, or iPad Pro 2020 or later (LiDAR required). iOS/iPadOS 17+ required. How accurate are the measurements? RoomScore is designed for guidance and benchmarking, not certification. Measurements are approximate and device-relative; accuracy varies by device, room conditions, and technique. The app runs quality checks and may prompt a retry. How is RT60 calculated? RoomScore captures three claps, applies a 150 Hz high-pass filter, fits a T20 decay from -5 dB to -25 dB, and requires an R2 fit of at least 0.75 before reporting the median RT60. Why trust phone-based measurement? RoomScore enforces strict quality gates: device stability, clipping detection, and noise stability (overall spread at or below 24 dB, quiet window at or below 18 dB). If a scan fails, the app asks you to retry. How does RoomScore compare to professional meters? RoomScore is for fast screening and portfolio prioritization. Class 1 meters are required for certification, compliance, or critical acoustic design work. What data does RoomScore collect? RoomScore collects acoustic measurements, room metrics, and equipment info for benchmarks. Room names and location fields stay in your account. Room notes stay in your account and may be used for AI analysis. Environment signals (Wi-Fi, light, barometer, vibration, sound classification) may be included in anonymized research dataset for benchmarking context when captured. Photos are required for AI analysis and deleted from cloud storage after processing (cached locally up to 7 days). See the privacy policy for details. Is research contribution required? Yes. Using RoomScore requires contributing anonymized measurements (RT60, noise, room dimensions, equipment categories) to our research dataset. This helps build better benchmarks for everyone. Your measurements persist even if you delete individual scans. Only deleting your entire account removes your contributions (aggregated statistics may remain). What happens if I delete my account? All account data (room names, photos, notes, analysis) is deleted within 30 days. Your individual research records are removed from the dataset. Aggregated statistics (e.g., average RT60 across 1,000 rooms) remain for benchmark integrity but cannot identify you. Can I use this for acoustic certification? No. RoomScore is for screening and planning. For certification, use calibrated Class 1 equipment and a licensed acoustical engineer. Will core features stay free? The plan is to keep core measurement and offline scoring free. Optional paid tiers may add exports, team workflows, or advanced analytics later. What is the audio coverage map? The coverage map shows where remote callers can hear you clearly across the room. Walk the room while RoomScore plays reference audio through the speaker system and records through the mic. The result is a color-coded heatmap showing audio quality at every position. Can I test actual call quality? Yes. RoomScore can create a test call directly from the app and capture real call quality metrics: MOS score, jitter, packet loss, and latency. Any Zoom-enabled conference room can join the test call. Ready to trust the score? Join facilities teams using RoomScore to eliminate audio friction before it hits the calendar. Start Free Room Audit --- # Conference Room Audio Testing Tool Source: https://roomscore.tech/conference-room-audio-testing-tool/ Conference Room Audio Testing Tool and Sound Test App - RoomScore RoomScore Conference Room Audio Testing Tool for IT and Facilities Teams Last updated: March 20, 2026 By: Ryan, RoomScore Founder RoomScore is a conference room audio testing tool and iPhone conference room sound test workflow. Capture RT60, noise floor, and mic coverage in under 10 minutes, then route the next fix with confidence. Built for: IT managers, facilities teams, and AV integrators managing 10-100 room portfolios in the U.S. and Canada. One room test, three evidence streams RoomScore packages the room scan, acoustic checks, and coverage workflow into one repeatable field audit so teams can compare rooms without turning every complaint into a subjective debate. Echo decay RT60 Background noise dBFS Seat pickup Coverage 01 Scan Capture room geometry, setup context, photos, and normal room use. 02 Measure Run RT60, noise, and optional coverage checks in one pass. 03 Score Separate acoustic health from AV fit with confidence indicators. 04 Act Choose treatment, placement, retest, or escalation based on evidence. What the tool measures RT60 echo decay (screening-grade, trend-friendly) Background noise stability and likely masking risk Seat-level microphone coverage quality Why teams use it Most room tickets say “audio sounds bad” with no objective evidence. This workflow gives measurable pass/watch/intervene signals so teams can stop guessing and act faster. Related RoomScore workflows Need a deeper RT60 workflow? Continue with the RT60 measurement app for iPhone to compare echo decay against target bands. Managing repeated complaints across sites? Move rooms into the facilities room audit software workflow so audits and re-tests stay standardized. References and templates Compare your room findings against the AVIXA audiovisual systems performance verification guide , then document the before-and-after evidence in the conference room audio acceptance template (PDF) . Related troubleshooting guides Zoom meeting room audio troubleshooting Teams room echo troubleshooting App vs meter vs consultant comparison Can’t hear everyone troubleshooting Start Free iPhone Audit Measure RT60, noise, and coverage in one guided workflow. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. --- # RT60 Measurement App for iPhone Source: https://roomscore.tech/rt60-measurement-iphone-app/ RT60 Measurement App for iPhone Conference Room Testing - RoomScore RoomScore RT60 Measurement App for iPhone Conference Room Testing Last updated: March 20, 2026 By: Ryan, RoomScore Founder RoomScore is an RT60 measurement app for iPhone built for conference room testing. Capture three clap decays, pass quality gates, and compare each room against practical target bands. Use case: fast screening and portfolio prioritization for teams managing 10-100 rooms. Turn a clap test into a room decision RoomScore keeps the RT60 workflow practical: capture repeatable decays, show the confidence gate, then connect the result to the room's target band instead of leaving teams with a raw number. Clap captures 3 passes Quality gates SNR + fit Decision output Pass / watch / fix 01 Capture Run three guided clap decays from consistent measurement positions. 02 Fit Use decay quality checks before trusting the measured RT60. 03 Compare Match the result against room volume and hybrid meeting targets. 04 Retest Confirm that layout, treatment, or setup changes improved the room. How the RT60 workflow works Capture three clap decays at consistent room positions Apply quality gates and confidence checks Compare measured decay against target band for room volume Re-test after treatment or setup changes Related RT60 resources RT60 targets for conference rooms Meeting room RT60 calculator What is RT60? App vs meter vs consultant comparison Use RT60 inside a full room workflow When you need the full conference room sound test, start with the conference room audio testing tool to capture RT60, noise floor, and microphone coverage in one pass. If you manage repeated echo complaints across sites, connect those RT60 checks to the facilities room audit software workflow so every re-test and remediation is documented consistently. References and standards context Use RoomScore as a fast screening workflow, then compare your decay targets with the ISO 3382-2 room acoustics standard overview and the AVIXA audiovisual systems performance verification guide . Start Free iPhone RT60 Audit Capture RT60, noise, and coverage in one guided room workflow. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. --- # Conference Room Acoustics Benchmarks: RT60, Noise, and Coverage Source: https://roomscore.tech/docs/conference-room-acoustics-benchmarks Conference Room Acoustics Benchmarks: RT60, Noise, and Coverage - RoomScore RoomScore Conference Room Acoustics Benchmarks: RT60, Noise, and Coverage Published: May 18, 2026 Last updated: May 18, 2026 By: Ryan, RoomScore Founder RoomScore benchmarks are built from anonymized conference room measurements: RT60, noise floor, room geometry, microphone coverage, and score outputs. This public snapshot uses 159 verified research records collected through May 13, 2026. Who this guide is for: IT managers and facilities leaders managing 10-100 conference rooms in hybrid meeting environments. Trust note: Keep measured values and inferred guidance separate when deciding room fixes. Benchmark dashboard Verified aggregate room data, with sample counts visible so the signal stays honest. May 18 snapshot 159 research records Jan 2 to May 13, 2026 0.44s median RT60 middle half: 0.37s to 0.52s -62.5 median noise dBFS device-relative screening metric 88 median room score 157 scored records Observed risk signals Most rooms are workable, but the coverage gap is much more visible than the median RT60 suggests. RT60 above 0.8s 9.4% Coverage below 50% 40.0% Coverage below 70% 68.9% Scores below 60 10.8% Coverage sample pattern Seat-level pickup is where room-by-room testing changes the decision. Clear Watch Missed seat Small rooms 51 records. Median RT60 0.43s. Coverage median 82.4% from 9 samples. Medium rooms 102 records. Median RT60 0.46s. Coverage median 53.9% from 35 samples. Large rooms 6 records. Median RT60 0.56s. Treat as directional until sample size grows. Benchmark snapshot This benchmark is intentionally narrow: it reports anonymized aggregate measurements from the current RoomScore research collection, not customer names, room names, GPS coordinates, floor plans, or photos. The verified snapshot contains 159 research records, with the oldest included timestamp on January 2, 2026 and the latest included timestamp on May 13, 2026. Because the dataset is still early, treat these numbers as screening benchmarks for IT and facilities prioritization rather than formal acoustic standards. RT60 sample count: 159 rooms Noise floor sample count: 159 rooms Coverage sample count: 45 rooms Score sample count: 157 rooms What the current dataset says The median measured RT60 is 0.44 seconds. The middle half of rooms fall from 0.37s to 0.52s, while 9.4% of measured rooms are above 0.8s, a range where speech clarity complaints become more likely in many hybrid meeting rooms. The median device-relative noise floor is -62.5 dBFS, with the middle half from -70.2 dBFS to -57.8 dBFS. Device-relative dBFS is useful for comparing RoomScore scans, but it is not the same as a calibrated dB SPL reading. The median microphone coverage result is 58.6%. Coverage is the least mature metric in this snapshot because only 45 records include a completed coverage walk test. Median Room Score: 88 across 157 scored records 10.8% of scored records are below 60 Median C50 clarity estimate: 13.6 dB across 156 records Median glass-to-wall ratio: 4.5% Benchmarks by room size Room volume changes the interpretation. A 0.56s RT60 can be acceptable in a large room, but the same value may be more noticeable in a small huddle room used for daily calls. Small rooms in this snapshot are under 30 m3, medium rooms are 30-150 m3, and large rooms are above 150 m3. The current dataset is strongest for small and medium rooms; large-room data should be treated as directional only. Small rooms: 51 records, median RT60 0.43s, median coverage 82.4% from 9 coverage samples Medium rooms: 102 records, median RT60 0.46s, median coverage 53.9% from 35 coverage samples Large rooms: 6 records, median RT60 0.56s, median coverage 28.1% from 1 coverage sample Coverage is the visible gap RT60 and noise are broadly captured because they are part of the core acoustic test. Coverage requires a walk test, so fewer records include it. Among rooms with coverage data, 40.0% are below 50% coverage and 68.9% are below 70% coverage. That does not mean every room is unusable; it means the microphone pickup pattern often deserves room-specific verification instead of brand-level assumptions. For facilities teams, this is the operational signal: a room can have acceptable reverberation but still fail remote participants if the microphone coverage misses seats. How to use these benchmarks Use the benchmark page to set triage thresholds and explain why repeatable measurements matter. It is especially useful when a room sounds bad but hardware dashboards show no obvious error. Compare RT60 against room size, compare noise against past scans from the same building, and treat coverage results as a seating-position check rather than a generic device score. As the dataset grows, RoomScore can publish stronger percentile bands by room type, equipment class, and treatment condition. Until then, transparent sample counts are more trustworthy than over-precise claims. FAQ How many records are in the current RoomScore benchmark snapshot? The public benchmark page uses 159 anonymized research records verified from the RoomScore research collection, with 45 records containing completed microphone coverage data. Are RoomScore noise measurements calibrated dB SPL readings? No. RoomScore reports device-relative dBFS in this benchmark snapshot. It is useful for comparing RoomScore scans and trends, but it is not a replacement for a calibrated sound level meter. Why publish sample counts next to every benchmark? Sample counts protect trust. RT60 and noise have full coverage in this snapshot, while microphone coverage has fewer records and should be interpreted more cautiously. Related Guides RT60 Targets for Conference Rooms Meeting Room Noise Floor Audio Coverage Mapping Acoustic Assessment Framework Conference Room Acoustics Glossary Start a 5-minute room audit on iPhone Measure RT60, noise, and coverage, then prioritize fixes with confidence across your portfolio. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. --- # Why Does My Conference Room Echo? Source: https://roomscore.tech/docs/conference-room-echo Why Does My Conference Room Echo? - RoomScore RoomScore Why Does My Conference Room Echo? Published: February 2, 2026 Last updated: May 11, 2026 By: Ryan, RoomScore Founder The short answer: Echo happens when sound bounces off hard surfaces and returns to the microphone with a slight delay. Glass walls, bare ceilings, and hard floors are the usual culprits. Conference room echo on Teams or Zoom is usually the same room problem, and the fix is adding soft, sound-absorbing materials in the right places. Echo cause map Most echo complaints come from the same pattern: reflective surfaces lengthen decay, then microphones capture late reflections as muddy speech. Room-first diagnosis Cause Hard surfaces Glass, drywall, whiteboards, and hard floors reflect speech energy. Signal Long RT60 Claps ring out instead of dying quickly. Call impact Blurred speech Remote listeners hear reflections mixed with the direct voice. Fix Add absorption Panels, ceiling treatment, curtains, rugs, and softer furniture reduce decay. RT60 risk bands Under 0.6s good 0.6s to 0.8s watch Above 0.8s fix Fast field test Clap once. If the tail is obvious, measure RT60 before retuning devices or swapping microphones. Immediate decay Pass Short tail Watch Flutter or ring Intervene How Echo Works in Conference Rooms When someone speaks in a room, sound travels in all directions. Some of it goes directly to the microphone (direct sound), while the rest bounces off walls, ceiling, and floor before reaching the mic (reflected sound). The problem: reflected sound arrives slightly later than direct sound. This delay causes two issues: Speech becomes muddy. Consonants blur together because reflections from the previous syllable overlap with the next one. Listening becomes tiring. Remote participants' brains work harder to separate speech from reflections, causing fatigue in longer meetings. In person, you don't notice this as much because your brain is good at filtering reflections in familiar spaces. But remote participants only hear what the microphone captures - and microphones capture everything. Problem Surfaces Some surfaces reflect almost all sound (bad for echo), while others absorb most of it (good). Here's how common conference room surfaces compare: Highly reflective (problematic) Glass walls and windows: Reflect about 97% of sound. The most common echo culprit in modern offices. Drywall: Reflects about 95% of sound. Standard wall material, and a major contributor. Concrete or plaster ceilings: Reflect 95%+ of sound. Especially problematic with high ceilings. Whiteboards: Essentially mirrors for sound. Large whiteboards amplify echo. Hard floors: Tile, concrete, hardwood, and vinyl all reflect heavily. Moderately absorptive Drop ceiling tiles: Absorb 50-70% of sound. A good baseline, but not enough alone. Upholstered furniture: Chairs with fabric help. Leather less so. Curtains: Heavy curtains absorb well. Thin blinds don't help much. Highly absorptive (helpful) Acoustic panels: Purpose-built panels absorb 80-95% of sound. The most effective treatment. Thick carpet: Absorbs 30-50% of sound. Every bit helps. Acoustic ceiling clouds: Suspended panels that catch sound before it reflects off the ceiling. Heavy drapes: Thick, floor-to-ceiling curtains can substitute for wall treatment. How Much Echo is Too Much? Acousticians measure echo as RT60 - the time it takes for sound to decay by 60 decibels after the source stops. Here's what different RT60 values mean for conference rooms: RT60 What it means < 0.4s Excellent. Speech is crisp and clear. Well-treated rooms. 0.4 - 0.6s Good. Comfortable for most meetings. Target range for conference rooms. 0.6 - 0.8s Acceptable. Some echo noticeable. Remote participants may strain slightly. 0.8 - 1.0s Problematic. Clear echo. Long meetings become fatiguing. > 1.0s Poor. Significant echo. Speech clarity seriously degraded. Room size matters: larger rooms naturally have longer RT60 because sound has farther to travel. A 0.6s RT60 is excellent for a large boardroom but may be high for a small huddle room. Quick Echo Test You don't need equipment to get a rough sense of your room's echo: Stand in the center of the room (or where people typically sit). Clap your hands once, sharply. Listen to the decay. What to listen for: Sound dies almost immediately: Good - echo is controlled. Sound lingers noticeably (like a short "tail"): Moderate echo - room would benefit from treatment. Sound rings, flutters, or seems to bounce around: Significant echo - this is likely causing problems on calls. Try this in different parts of the room. Corners and areas near glass walls often have the worst echo. Want precise measurements? RoomScore measures RT60 from three claps with quality checks and compares it to targets for your room size. See the RT60 measurement app How to Fix Echo The goal is to add absorption to reduce reflections. You don't need to treat every surface - strategic placement matters more than total coverage. Most effective placements Wall behind seating (first priority). Sound from speakers reflects off the back wall directly into the microphone. Treating this wall has the biggest impact. Ceiling above the table. Sound bounces between the table and ceiling repeatedly. Ceiling panels or "clouds" break this cycle. Side walls at "first reflection points." The spots where sound from speakers first hits the side walls before bouncing to the mic. Usually about 1-2 meters from where people sit. Glass walls. If you can't add panels, use heavy curtains or acoustic blinds. Even partially covering glass helps. Treatment options (lowest to highest investment) Rugs: A thick rug under the table helps, especially on hard floors. Low cost, immediate improvement. Curtains: Heavy, floor-to-ceiling curtains on glass walls. Can be drawn back when not on calls. Acoustic panels: Fabric-wrapped fiberglass or foam panels. Most effective per square meter. 2-4 panels often enough for small rooms. Ceiling clouds: Suspended panels for rooms with high or hard ceilings. More involved installation but very effective. Professional treatment: For critical spaces, acoustic consultants can model the room and specify exact treatment. How much treatment do you need? As a rough guide: Small huddle room (15-25 m³): 2-4 m² of panels often sufficient. Medium conference room (40-80 m³): 4-8 m² typically needed. Large boardroom (100+ m³): 8-15 m² or more, plus ceiling treatment. These are starting points. Rooms with more glass or hard surfaces need more treatment. Use the right RoomScore workflow Use the conference room audio testing tool when you need a quick room-wide screen for echo, noise, and microphone pickup. If echo is the main complaint, continue with the RT60 measurement app for iPhone to compare decay against target bands. If the same complaint appears across multiple sites, move rooms into the facilities room audit workflow so every re-test follows the same evidence standard. For narrower symptom pages, continue with Teams echo troubleshooting , Zoom meeting room troubleshooting , or Logitech Rally Bar troubleshooting . Authoritative references Compare your room findings against the AVIXA audiovisual systems performance verification guide and the ISO 3382-2 room acoustics standard overview when you need a standards context for RT60 and room verification. FAQ Why does my conference room echo on Zoom or Teams? Conference room echo on Zoom or Teams usually starts in the room, not the app. Glass, drywall, hard floors, tables, and bare ceilings reflect speech back into the microphone after a short delay, which makes remote audio sound hollow or muddy. What is the fastest way to test conference room echo? Run a quick clap test from normal seating positions and listen for a lingering tail, flutter, or ringing. For a repeatable result, measure RT60 with a workflow that captures multiple claps and rejects low-confidence decay fits. What should I fix first in an echoey conference room? Start with room treatment before changing hardware. Prioritize the wall behind seating, the ceiling above the table, first-reflection side walls, and large glass surfaces because those surfaces send strong reflections back into the microphone. Related Topics What is RT60? - Understanding echo measurement Why Do My Conference Calls Sound Bad? - Overview of all audio problems How to Test Conference Room Audio - Testing methods compared Start a 5-minute room audit on iPhone Measure RT60, noise, and coverage, then prioritize fixes with confidence. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. \n \n \n --- # Conference Room Acoustics Glossary Source: https://roomscore.tech/docs/glossary Conference Room Acoustics Glossary - RoomScore RoomScore Conference Room Acoustics Glossary Published: May 18, 2026 Last updated: May 18, 2026 By: Ryan, RoomScore Founder Conference room acoustics vocabulary can hide simple decisions. This glossary defines RT60, noise floor, microphone coverage, and related terms in the language IT, facilities, and AV teams use during room audits. Who this guide is for: IT managers and facilities leaders managing 10-100 conference rooms in hybrid meeting environments. Trust note: Keep measured values and inferred guidance separate when deciding room fixes. Core acoustic terms RT60 is reverberation time: the estimated time it takes sound energy to decay by 60 dB after a sound stops. In meeting rooms, RT60 is one of the clearest ways to describe echo or hollow speech. T20 and T30 are practical RT60 estimation methods. Instead of waiting for a full 60 dB decay, they fit a smaller part of the decay curve and extrapolate to RT60. C50 is a speech clarity metric comparing early sound energy to later reflected sound energy. Higher C50 usually means speech is easier to understand. RT60: reverberation time T20/T30: decay-fit methods used to estimate RT60 C50: clarity ratio for speech intelligibility Noise terms Noise floor is the steady background sound in a room: HVAC rumble, projector noise, hallway bleed, or open-office spill. SPL means sound pressure level and is normally measured in dB SPL with a calibrated meter. dBFS is a digital audio level relative to the maximum level a device can record. RoomScore uses device-relative dBFS for app-based screening and trend comparison. Use calibrated SPL when certification or formal compliance is required. Material and prediction terms NRC means Noise Reduction Coefficient. It describes how absorptive a material is across a speech-relevant frequency range. Sabine and Eyring are equations used to estimate reverberation from room volume and surface absorption. Sabine is simpler; Eyring handles higher absorption cases more realistically. These equations are useful for estimating direction and treatment impact, but measured RT60 remains the stronger room-specific signal. Call quality and coverage terms Microphone coverage describes whether the room system captures speech clearly from the seats people actually use. MOS means Mean Opinion Score, a call-quality scale often used by conferencing systems. MOS can reflect network and codec behavior as well as room capture quality. Dropout rate describes moments where captured speech falls too low or disappears relative to the reference signal. How RoomScore separates measurement from interpretation Measured values such as RT60, noise floor, room volume, and coverage samples are treated as ground truth. Recommendations are interpretation layered on top of those measurements. That split matters because a model can help explain what to fix, but it should not rewrite physics. If a measurement is low confidence, the honest answer is to retry the measurement. Use this glossary as the vocabulary layer, then use the related guides to decide which measurement to run next. For most troubleshooting conversations, the practical sequence is simple: measure RT60 when the room sounds hollow, measure noise floor when speech is masked by HVAC or open-office spill, and run coverage mapping when remote participants cannot hear every seat. That keeps the conversation tied to evidence instead of brand preference. FAQ What is the most important acoustic term for conference rooms? RT60 is usually the most useful first term because it directly describes reverberation time, the measurement behind many echo and hollow-speech complaints. Is dBFS the same as dB SPL? No. dBFS is relative to a digital recording device's maximum level, while dB SPL is calibrated sound pressure level. Use dBFS for app screening and dB SPL for calibrated measurement. Why does microphone coverage matter if RT60 is good? A room can have acceptable reverberation and still fail remote participants if the microphone pickup misses seats or weakens speech at the edges of the table. Related Guides What Is RT60? Meeting Room Noise Floor Audio Coverage Mapping Conference Room Acoustics Benchmarks RT60 Target Calculator Start a 5-minute room audit on iPhone Measure RT60, noise, and coverage, then prioritize fixes with confidence across your portfolio. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. --- # How to Test Conference Room Audio Quality Source: https://roomscore.tech/docs/how-to-test-conference-room-audio How to Test Conference Room Audio Quality - RoomScore RoomScore How to Test Conference Room Audio Quality Published: February 2, 2026 Last updated: May 11, 2026 By: Ryan, RoomScore Founder The short answer: Test three things - echo (clap test), background noise (silence test), and microphone coverage (walk test). These quick checks need no equipment and reveal most problems. For a repeatable conference room sound test and room-to-room comparison, use a purpose-built workflow instead of guesswork. Five-minute diagnostic path Use the quick checks to separate room problems from device problems before you open a ticket or replace hardware. Echo + noise + coverage 01 Clap test Listen for a long tail, flutter, or ring after one sharp clap. 02 Silence test Listen for HVAC, hallway spill, display hum, or other steady noise. 03 Walk test Speak from each seat and mark where remote listeners lose clarity. 04 Retest Repeat after treatment, table changes, or mic placement fixes. RT60 echo decay room surfaces and absorption dBFS noise floor HVAC, hum, hallway spill Seats mic coverage where voices stay clear Plan next action treat, move, retest, or escalate Quick Tests (No Equipment Needed) These tests take 5 minutes, need no equipment, and reveal the most common problems. 1. The Clap Test (for echo) Stand in the center of the room, or where people typically sit. Clap your hands once, sharply. Listen to how the sound decays. What to listen for: Sound dies almost immediately: Echo is well-controlled. Good sign. Sound lingers (like a short tail): Moderate echo. May affect call clarity. Sound rings, flutters, or bounces: Significant echo. This room will sound harsh on calls. Try the clap test in different spots - corners and areas near glass walls often reveal the worst echo. 2. The Silence Test (for background noise) Sit in the room with the door closed. Make sure HVAC is running at normal levels (not a quiet period). Close your eyes and listen for 30 seconds. What to listen for: Air movement: Can you hear the HVAC? The microphone will too. Hallway sounds: Conversations, footsteps, doors closing. Electronic hum: Projectors, displays, computers. External noise: Traffic, construction, weather. If you can hear it, remote participants will hear it amplified through the microphone. 3. The Walk Test (for microphone coverage) Join a test call with a colleague who will listen remotely. Walk slowly around the room while speaking at normal volume. Count to ten repeatedly, or read a passage aloud. Ask your colleague to note where your voice stays clear and where it gets quiet or muffled. What to look for: Consistent audio throughout: Good coverage. Audio drops in certain spots: Those spots are outside the mic's effective range. Audio disappears entirely somewhere: Hard coverage limit - don't seat people there. Pay special attention to the far end of the table, corners, and anywhere people might sit. Smartphone App Testing Sound level apps on your phone can measure decibels (dB). They're not calibrated like professional meters, but they're useful for: Comparing noise levels between rooms Tracking whether a room gets noisier at certain times Getting rough numbers to share with facilities teams How to use a sound level app Download a sound level meter app (many free options available). Place your phone on the table, microphone facing up. Measure for at least 30 seconds with HVAC running normally. Note the average level (not just the peaks). Interpreting results Under 40 dB SPL: Good background noise level. 40-45 dB SPL: Acceptable, but noise may be noticeable on calls. Over 45 dB SPL: Problematic - noise will compete with speech. Limitations Phone microphones aren't calibrated - readings may be off by 5-10 dB. Can't measure echo (RT60) reliably. Can't map microphone coverage. Results vary by phone model and app. Purpose-Built Tools Tools designed specifically for conference room assessment offer more than generic sound level apps: What purpose-built tools provide Echo measurement (RT60): Actual decay time, not just "sounds echoey." Noise stability: Not just level, but whether noise is consistent or fluctuating. Coverage mapping: Visual map of where the microphone can hear. Quality validation: Checks that the measurement is reliable before reporting. Room-appropriate targets: What's "good" depends on room size. Comparison to benchmarks: How this room compares to others. How RoomScore works RoomScore runs a single workflow: echo via T20/T30 decay from three claps, background noise stability (device-relative dBFS), and optional coverage mapping during a test call. Results include quality-checked measurements, confidence scores, and comparison to similar rooms. Open the conference room audio testing tool When to use purpose-built tools Portfolio assessment: When you need to compare many rooms objectively. Before/after measurement: To verify that treatment actually improved the room. Justifying investment: Data helps make the case for acoustic treatment or equipment upgrades. Troubleshooting: When quick tests reveal a problem but you need specifics. Professional Measurement For certification, compliance, or critical spaces, professional acoustic measurement is required. What professional measurement involves Calibrated Class 1 or Class 2 microphones: Accuracy traceable to standards. Standardized sound sources: Dodecahedron speakers or starter pistols for impulse response. Multiple measurement positions: Averages across the room, not just one spot. Frequency-band analysis: RT60 and noise broken down by frequency. Full documentation: Reports suitable for certification or regulatory compliance. When you need professional measurement Certification: LEED, WELL, or other building certification programs. Regulatory compliance: Spaces with specific acoustic requirements. New construction sign-off: Verifying that contractors met specifications. Litigation or disputes: When measurements may be challenged. Critical spaces: Boardrooms, studios, or spaces where audio quality is paramount. What professional measurement costs Expect $500-2000+ per room depending on complexity, location, and reporting requirements. For a portfolio of many rooms, screening tools can identify which rooms actually need professional measurement. Method Comparison Method Cost Time Best for Quick tests Free 5 min Initial screening, identifying obvious problems Sound level app Free 5 min Rough noise comparison between rooms Purpose-built tool Free-$$ 5-10 min Portfolio assessment, before/after, justifying investment Professional $$$ Hours Certification, compliance, critical spaces Recommended approach Start with quick tests to identify rooms with obvious problems. Use a purpose-built tool to get measurements and prioritize which rooms need treatment. Reserve professional measurement for certification or spaces where precision matters. Most rooms don't need professional measurement - they need someone to actually test them and act on the results. Choose the right testing workflow Use the conference room audio testing tool when you need a repeatable conference room sound test on iPhone. If RT60 is the main metric you need, start with the RT60 measurement app for iPhone and compare results to the target calculator. If you manage 10-100 rooms, connect those spot tests to the facilities room audit workflow so triage, remediation planning, and re-tests stay standardized. Standards and comparison references Use the ISO 3382-2 room acoustics standard overview for reverberation context, the AVIXA audiovisual systems performance verification guide for room verification baselines, and the acceptance template (CSV) for repeatable handoffs. FAQ What should a conference room audio test measure? A useful conference room audio test should measure echo or RT60, background noise, and microphone coverage. Testing only call audio or only sound level misses common room-level causes of bad remote audio. Are free sound level apps enough for conference room testing? Free sound level apps can help compare rough background noise between rooms, but they do not reliably measure RT60, microphone coverage, or room-specific confidence. Use them for a first check, not for portfolio decisions. When do you need professional acoustic measurement? Use professional acoustic measurement for certification, compliance, construction sign-off, disputes, or critical rooms. For portfolio triage, a repeatable screening workflow can identify which rooms actually need professional measurement. Related Topics Why Do My Conference Calls Sound Bad? - Overview of all audio problems What is RT60? - Understanding echo measurement What is Audio Coverage Mapping? - Visualizing microphone reach Start a 5-minute room audit on iPhone Measure RT60, noise, and coverage, then prioritize fixes with confidence. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. \n \n \n --- # What is a Good Noise Floor for a Meeting Room? Source: https://roomscore.tech/docs/meeting-room-noise-floor What is a Good Noise Floor for a Meeting Room? - RoomScore RoomScore What is a Good Noise Floor for a Meeting Room? Published: February 2, 2026 Last updated: May 11, 2026 By: Ryan, RoomScore Founder The short answer: Below 40 dB is good, below 35 dB is excellent. Above 45 dB, background noise starts competing with speech and remote participants will strain to hear. The most common culprit is HVAC - that constant hum you tune out in person but the microphone picks up clearly. Why Noise Floor Matters for Conference Calls Background noise affects conference calls differently than it affects people in the room: You can tune it out. After a few minutes in a room, your brain filters out constant sounds like HVAC hum. You stop noticing it. Remote participants can't. They hear what the microphone captures. The mic doesn't filter anything - it picks up speech and noise equally. Noise competes with speech. When background noise is loud, remote participants have to turn up their volume. This amplifies both speech and noise, making it harder to follow. Noise causes fatigue. Straining to separate speech from background noise for an hour-long meeting is exhausting. People disengage. This is why a room can "feel" quiet to people sitting in it but sound noisy to remote participants. Noise Levels and What They Mean Background noise is measured in decibels (dB SPL, with a calibrated meter). Here's what different levels mean for conference rooms: Level Rating What to expect < 30 dB Excellent Very quiet. Recording studio territory. Rare in offices without special construction. 30 - 35 dB Very good Quiet room. HVAC barely audible. Ideal for important calls. 35 - 40 dB Good Typical well-designed conference room. Slight HVAC hum but speech easily understood. 40 - 45 dB Acceptable Noticeable background noise. Remote participants can hear HVAC or external sounds. 45 - 50 dB Problematic Noise competes with speech. Remote participants may ask people to repeat themselves. > 50 dB Poor Significant noise. Difficult for remote participants to follow. Not suitable for important calls. For reference: common sound levels 20 dB: Quiet recording studio, rustling leaves 30 dB: Whisper, quiet library 40 dB: Quiet office, residential neighborhood 50 dB: Moderate rainfall, normal conversation at 1 meter 60 dB: Normal conversation at arm's length, busy office NC ratings You may also see noise specified as NC (Noise Criteria) ratings. NC accounts for how noise is distributed across frequencies. Roughly: NC-25 to NC-30: Very quiet, ideal for conference rooms NC-30 to NC-35: Good, standard target for meeting spaces NC-35 to NC-40: Acceptable, typical open office background NC-40+: Too noisy for effective conferencing Common Noise Sources HVAC systems (most common) Heating, ventilation, and air conditioning create constant low-frequency rumble. Sources include: Air rushing through vents: Faster airflow = more noise. Ductwork vibration: Poorly secured ducts rattle and hum. Equipment rooms: Air handlers and compressors near or above the room. Return air paths: Open ceiling plenums transmit noise between rooms. HVAC noise is insidious because it's constant. You stop noticing it, but it's always there on the call. Hallway and adjacent spaces Conversations: People talking outside the door or in adjacent rooms. Footsteps: Hard floors in hallways amplify foot traffic. Doors: Opening and closing doors, especially without soft-close hardware. Open office noise: If walls don't go to the ceiling deck, open office sound travels over. Electronic equipment Projectors: Cooling fans in projectors can be surprisingly loud. Computers: Desktop PCs with fans, especially under heavy load. Displays: Some large displays have cooling fans. Network equipment: Switches or routers in the room. External noise Traffic: Cars, trucks, buses - especially problematic near windows. Construction: Temporary but can make rooms unusable. Aircraft: Near flight paths. Weather: Rain on windows, wind. How to Assess Your Room Simple listening test Sit in the room with the door closed and HVAC running normally. Close your eyes and focus on what you hear. Note any constant sounds (hum, rush of air) and intermittent sounds (hallway, outside). What to listen for: Can you hear air moving? That's HVAC noise the mic will pick up. Can you hear conversations outside? Remote participants will hear them too. Is there a constant hum or buzz? Check for electronic sources. Does noise level change? HVAC cycling on/off, or intermittent traffic? Phone app measurement Many smartphone apps measure sound levels in dB. They're not calibrated like professional meters, but they're useful for comparison: Measure with HVAC running normally (not during a quiet period). Measure for at least 30 seconds to catch fluctuations. Note both the average and the peaks. How RoomScore measures noise RoomScore captures 10 seconds of ambient noise and analyzes stability. It reports a device-relative noise index (dBFS) with a Good/OK/High rating and flags likely sources (speech bleed, mechanical noise, intermittent noise). Learn more about RoomScore How to Reduce Background Noise HVAC noise Reduce airflow during calls: If you have zone control, lower the fan speed or close vents partially during important meetings. Add duct silencers: Inline silencers in the ductwork reduce air rush noise. Seal gaps: Check for gaps around vents where noise escapes. Acoustic sealant helps. Add diffusers: Replace standard vents with low-velocity diffusers that spread air more quietly. Relocate equipment: If possible, move air handlers or compressors away from the room. Hallway and adjacent noise Door seals: Add weatherstripping and door sweeps. Sound travels through gaps. Solid-core doors: Replace hollow-core doors with solid-core for better isolation. Automatic door closers: Soft-close mechanisms prevent slamming. Extend walls: If walls stop at the drop ceiling, extend them to the deck above. Add mass: A second layer of drywall with damping compound significantly improves wall isolation. Equipment noise Move it out: Put projectors, PCs, and network gear in an adjacent closet or rack room. Use quiet models: When replacing equipment, check noise specifications. Isolate vibration: Put equipment on isolation pads to reduce transmitted hum. External noise Heavy curtains: Thick, floor-to-ceiling curtains absorb some external noise. Secondary glazing: Adding a second layer of glass to windows significantly reduces traffic noise. Seal window frames: Check for air gaps around windows where sound enters. Choose rooms wisely: For critical meetings, use interior rooms away from street-facing windows. FAQ What is a good noise floor for a meeting room? As a practical screening target, under 40 dB SPL is good for a meeting room, 40-45 dB SPL is usually acceptable, and sustained levels above 45 dB SPL are likely to compete with speech on calls. Why does HVAC noise matter on conference calls? HVAC noise matters because microphones capture and remote platforms amplify steady background noise. Even if people in the room tune it out, remote listeners hear it under every word and must work harder to understand speech. How do you reduce meeting room noise floor? Start with the dominant source: adjust or service HVAC, seal doors and wall gaps, relocate noisy equipment, isolate vibration, and use interior rooms or window treatments when external noise is the cause. Related Topics Why Do My Conference Calls Sound Bad? - Overview of all audio problems Why Does My Conference Room Echo? - The other major audio problem How to Test Conference Room Audio - Testing methods compared Start a 5-minute room audit on iPhone Measure RT60, noise, and coverage, then prioritize fixes with confidence. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. \n \n \n --- # What is RT60? Source: https://roomscore.tech/docs/what-is-rt60 What is RT60? Reverberation Time Explained - RoomScore RoomScore What is RT60? Published: February 2, 2026 Last updated: May 11, 2026 By: Ryan, RoomScore Founder RT60 (Reverberation Time 60) is the time it takes for sound to decay by 60 decibels after the source stops. It's the standard measurement for room echo. A conference room with RT60 of 0.5 seconds means sound fades to near-silence in half a second after someone stops speaking. Higher RT60 = more echo. Lower RT60 = less echo. What RT60 Actually Means Imagine someone claps their hands in a room. The sound doesn't stop instantly - it bounces off walls, ceiling, and floor, gradually getting quieter with each reflection until it fades to silence. RT60 measures how long that fade takes. Specifically, it's the time for the sound to drop by 60 decibels (dB). A 60 dB drop means the sound is about one-millionth as loud as when it started - essentially inaudible. Why does this matter for conference calls? When someone speaks, their voice bounces around the room before reaching the microphone. If the bounce lasts too long (high RT60), the reflected sound from one syllable overlaps with the next syllable. This makes speech sound muddy and hard to follow - especially for remote participants who only hear what the microphone captures. In practical terms: Low RT60 (under 0.5s): Sound dies quickly. Speech is crisp. Room sounds "dry" or "dead." Medium RT60 (0.5-0.8s): Some natural warmth. Good for most conference rooms. High RT60 (over 0.8s): Noticeable echo. Speech clarity suffers. Meetings become tiring. How RT60 is Measured The basic principle Create a sudden, loud sound (impulse) - like a clap, a popped balloon, or a burst from a speaker. Record the decay as the sound bounces around and fades. Measure how long it takes to drop 60 dB. T20 and T30: practical measurement methods In real rooms, measuring a full 60 dB drop is often impractical - background noise (HVAC, traffic) masks the end of the decay before it drops that far. So acousticians use extrapolation: T20: Measure the decay from -5 dB to -25 dB (20 dB range), then multiply by 3 to estimate full RT60. T30: Measure from -5 dB to -35 dB (30 dB range), then multiply by 2. T20 is more practical in noisy environments. T30 is more accurate when background noise is low enough to capture a longer decay. Professional vs. screening measurements Professional measurement: Uses calibrated Class 1 microphones, standardized sound sources, and multiple measurement positions. Required for certification and compliance. Screening measurement: Uses phone microphones with quality checks. Good enough for identifying problem rooms and prioritizing treatment. Not for certification. How RoomScore measures RT60 RoomScore uses your phone's microphone to capture three claps. It applies a 150 Hz high-pass filter (to reduce HVAC rumble), fits T20 or T30 decay curves when possible (T10 as a fallback), and requires an R^2 fit of at least 0.75 plus SNR/decay checks before reporting results. The final RT60 is selected from the most consistent claps (often the median) and includes a confidence score. Learn more about RoomScore What's a Good RT60 for Conference Rooms? Different spaces have different ideal RT60 values. Concert halls aim for 1.5-2.0 seconds (for musical richness). Recording studios aim for 0.2-0.3 seconds (for precision). Conference rooms fall in between: RT60 Rating What to expect < 0.3s Very dry May feel uncomfortably "dead." Rare in offices without heavy treatment. 0.3 - 0.5s Excellent Crisp speech, minimal echo. Well-treated rooms. 0.5 - 0.6s Good Target range for most conference rooms. Natural sound with controlled echo. 0.6 - 0.8s Acceptable Some echo noticeable. Remote participants may need to concentrate. 0.8 - 1.0s Problematic Clear echo. Long meetings become fatiguing. Treatment recommended. > 1.0s Poor Significant echo. Speech clarity seriously degraded. Needs treatment. RoomScore adjusts targets by room volume, so larger rooms can have higher acceptable RT60 values. How Room Size Affects RT60 Larger rooms naturally have longer RT60 because sound has farther to travel between reflections. This means: A 0.4s RT60 in a small huddle room (20 m3) is good. A 0.6s RT60 in a large boardroom (150 m3) is quite good - hard to achieve without treatment. A 0.8s RT60 in a small room is problematic. A 0.8s RT60 in a large room can be acceptable but still echoey. Rule of thumb for conference rooms: Small (under 30 m3): Target 0.2-0.4s Medium (30-150 m3): Target 0.4-0.6s Large (over 150 m3): Target 0.6-0.9s These targets are for speech intelligibility in video conferencing. Music rehearsal rooms or multi-purpose spaces might have different requirements. How to Improve RT60 To lower RT60 (reduce echo), add sound-absorbing materials. The relationship is roughly linear: adding absorption reduces RT60 proportionally. Effective treatments: Acoustic panels: Fabric-wrapped fiberglass panels absorb 80-95% of sound. Most effective per square meter. Ceiling treatment: Acoustic ceiling tiles or suspended "clouds" catch sound before it reflects. Curtains: Heavy curtains on glass walls provide absorption that can be opened when not needed. Carpet: Thick carpet on hard floors helps, especially for footsteps and chair noise. How much treatment? As a rough guide, adding 1 m² of good acoustic panel (NRC 0.8+) to a 50 m³ room might reduce RT60 by about 0.05-0.1 seconds. So if you're at 0.8s and want to reach 0.5s, you might need 3-6 m² of treatment. Placement matters too. Treating the wall directly behind seating typically has more impact than treating a side wall. Learn more about fixing conference room echo FAQ What does RT60 measure? RT60 measures how long sound takes to decay by 60 decibels after the sound source stops. In conference rooms it is the standard way to describe room echo or reverberation. What is a good RT60 for a conference room? For speech-focused conference rooms, a practical target is usually about 0.3-0.6 seconds in small and medium rooms. Larger boardrooms can tolerate longer values, but sustained readings above 0.8 seconds usually create clarity problems for remote listeners. Can an iPhone measure RT60 accurately enough for screening? An iPhone can be useful for room screening when the workflow uses multiple claps, T20 or T30 decay fitting, SNR checks, R2 quality gates, and confidence scoring. It is not a replacement for calibrated Class 1 or Class 2 measurement when certification is required. Related Topics Why Does My Conference Room Echo? - Causes and solutions Why Do My Conference Calls Sound Bad? - Overview of all audio problems How to Test Conference Room Audio - Testing methods compared Start a 5-minute room audit on iPhone Measure RT60, noise, and coverage, then prioritize fixes with confidence. Start Free iPhone Audit Available on iOS in the U.S. and Canada only. \n \n \n