What is RT60 and why is it important for streaming and podcasts?

RT60 (Reverberation Time 60dB) is the time required for a sound impulse (such as a hand clap) to decay by 60 decibels into ambient silence. For voiceovers, streaming, and podcasting, an RT60 between 0.2s and 0.4s is ideal. Rooms exceeding 0.6s produce a hollow 'bathroom' or 'empty cathedral' echo that ruins vocal clarity.

How does this hand-clap acoustic test work?

When you clap your hands near your microphone, the Web Audio API captures the sharp transient impulse and samples the subsequent energy decay curve (Schroeder integration) at high resolution, calculating the rate of acoustic attenuation in seconds.

How can I reduce room echo without buying expensive studio panels?

1. Hang thick curtains over bare windows. 2. Place a plush rug over hardwood or tile floors. 3. Position bookshelves or open closets behind your microphone to act as natural sound diffusers. 4. Move your mouth closer to the microphone (within 2-4 inches) so direct vocal energy dominates room reflections.

Room Reverb & Echo RT60 Acoustics Test Online

Measured RT60 Decay

-- sec

Awaiting Hand Clap

Peak Impulse Level

-- dB

Threshold: > -12 dBFS

Clap Samples

Studio Acoustic Grade

⚪ Mic Inactive

Vocal Clarity Assessment

👏 Hand-Clap Acoustic Impulse Capture

Start the mic below, stand 1 meter away, and clap your hands loudly once. The tool automatically isolates the sound impulse and calculates room reverb decay.

🎙️ Click "Enable Microphone" Above to Begin

All audio processing is executed 100% locally in your browser. No voice or sound data is ever recorded or uploaded.

< 0.30s — Studio Booth

Professional voiceover space. High acoustic absorption; zero hollow room echo.

0.30s – 0.50s — Good Living Room

Balanced absorption with rugs/furniture. Excellent for Discord, Zoom, and casual gaming.

0.50s – 0.80s — Noticeable Echo

Dry speech sounds hollow. Microphones pick up room reverb and keyboard click reflections.

> 0.80s — Cathedral / Tile Room

Bare walls and tile floor. Severe flutter echo makes vocal communication difficult.

⭐ Broadcast Studio Recommendation

Echoey Room? Switch to a Dynamic Broadcast Microphone

Condenser microphones have ultra-sensitive diaphragms that pick up every room reflection and dog bark. The Shure MV7+ / Elgato Wave DX dynamic microphones utilize a cardioid capsule with built-in acoustic isolation that completely rejects room reverb outside 4 inches.

✓ Rejects Untreated Room Echo ✓ Rich Radio Broadcast Warmth ✓ USB & XLR Hybrid Connectivity

🛒 View Shure MV7+ on Amazon → Verified authentic pricing via Amazon Prime

The Physics of Room Acoustics & Reverberation Time (RT60)

When speaking into a microphone in an untreated bedroom or home office, less than 50% of the acoustic energy captured by the capsule is your direct voice. The remainder consists of sound waves that bounced off drywall, glass windows, hard desks, and bare floors—arriving milliseconds later as destructive reflections.

Sabine's Formula: How Acoustic Panels Absorb Reverb

In 1898, physicist Wallace Clement Sabine formulated the universal law of room reverberation:

RT60 = 0.161 * (Room Volume in m³) / (Total Surface Absorption 'A')

Hard drywall has an absorption coefficient of only 0.05 (reflecting 95% of sound), while high-density open-cell acoustic foam absorbs up to 85% of high-frequency speech reflections.

❓ Frequently Asked Questions (FAQ)

Why does Discord make my room sound like a bathroom?

Discord uses Krisp AI noise suppression. While Krisp removes constant computer fan noise, erratic room reverb causes AI artifacts that make your voice sound metallic, robotic, and underwater. Fixing room acoustics at the source is the only clean remedy.

What is a flutter echo?

A flutter echo is a rapid, ringing ping sound produced when sound bounces back and forth repeatedly between two parallel bare walls. Clap your hands in an empty room: if you hear a high-pitched metallic ping, you have severe flutter echo.

Does a microphone pop filter remove room echo?

No. Pop filters and foam windscreens only stop direct bursts of breath (plosives like P and B sounds) from overloading the capsule. They do not alter room sound reflections.

Where should I place acoustic panels first?

Use the 'mirror trick': sit at your desk and have a friend slide a mirror along the side walls. Wherever you see your microphone in the reflection is a primary reflection point that needs an acoustic panel.

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