YEOEUM

Discover how sound lingers in your space. YEOEUM uses your smartphone’s microphone to estimate reverberation time (RT60) from three hand claps. Explore how sound reflections decay in rehearsal rooms, recording studios, classrooms, performance spaces, and everyday environments. THREE CLAPS. NO EXTRA EQUIPMENT. Use your phone’s built-in microphone without connecting an external speaker or measurement microphone. Follow the on-screen prompts, clap three times, and stay quiet while the app captures the decay. EXPLORE MID-FREQUENCY REVERBERATION View an overall estimate based on the 500 Hz, 1 kHz, and 2 kHz bands. Open the details to explore individual frequency-band estimates and measurement status. KEEP A RECORD OF EACH SPACE Add a place name, notes, and an optional photo to your measurements. Reopen saved records to view the overall estimate and detailed results. SHARE RESULTS AND EXPORT DATA Share a result image or export CSV and JSON data. You can measure, save, and share results without adding a photo. YOUR DATA AND CHOICES Measurement recordings and records are processed and stored on your device. Microphone access is required for measurement. Taking photos and saving result images are optional. Sharing results and sending inquiry materials are initiated by you. Anonymous usage and diagnostic statistics are on by default and can be turned off in settings. Recordings, photos, place names, notes and individual RT60 values are not sent as analytics. MEASUREMENT GUIDANCE YEOEUM provides estimates for preliminary acoustic observations. Results depend on background noise, clap characteristics, device, and measurement position. An overall estimate may be unavailable when analysis conditions are insufficient. The app does not replace certified acoustic instruments or professional measurements.