Room Acoustics: RT60 Meter

Room Acoustics is an RT60 reverb meter, room mode analyzer, and acoustic measurement tool for Android. Just clap once and your phone measures how long sound lingers in any room, scoring the space and showing you exactly how it decays.

▶ MAIN FEATURES
• RT60 reverberation time measured with a single clap test
• Decay curve showing how sound energy fades over time
• Background noise level in dB so you know the room's noise floor
• Clarity grade that rates how clear speech and music will sound
• Room type estimate (live, neutral, or dead)
• Frequency response and room mode analysis
• Mic-based measurement — no extra hardware needed
• Save and compare multiple measurements
• Dark mode for control rooms and dim studios
• Works fully offline, with no account required

▶ HOW TO USE
1. Open Room Acoustics and grant microphone access.
2. Stand near the center of the room and hold the phone steady.
3. Tap Measure, then clap once, sharply.
4. Read the RT60 time, decay curve, noise floor, and clarity grade.
5. Save the result and repeat to compare positions or treatments.

▶ WHO USES IT
• Recording and home-studio owners tuning their rooms
• AV and home-theater installers checking listening spaces
• Acousticians and consultants doing quick field checks
• Musicians and podcasters chasing a cleaner sound
• Office and restaurant designers controlling echo and noise
• Students of acoustics learning RT60 and room modes hands-on

Room Acoustics needs microphone permission to capture the clap and measure decay. Phone mics aren't lab-grade, so treat the numbers as a fast, repeatable guide for relative tuning rather than certified lab data. Clap, measure, and hear your room improve.

Recent changes:
Fixed the RT60 measurement screen closing on launch on Chromebooks and tablets that run phone apps through a compatibility layer.