Room Echo Meter

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 309.2 Hz, 89 cents sharp of D4, the nearest tine on the comb. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.

Tap “Use my microphone” in the Splash tab, then clap once: the echo time shows on the back wall.

Reverberation is sound that keeps bouncing around a room after its source stops. RT60 is the time for its energy to fall by 60 decibels, to one millionth. This splash estimates that time from a measured decay slope, extrapolating when it cannot observe the entire 60-decibel fall; background noise and the recording affect the result.

Tap the splash to hear and see the sample room's clap. For your room, tap Use my microphone in the Splash tab, clap sharply once and stay quiet for two seconds. The page estimates background noise and fits the sound's fading energy. The back wall shows the result; floor rings visualize the decay at half speed. A noisy or unclear clap may be rejected. Audio is processed temporarily on this device and is not uploaded or saved. This is an exploratory estimate, not a calibrated room-acoustics measurement.

Made in Splashery. Its code is MIT.

This link opens it in the Playground. To put it on your own page, add the element and one script tag. Every option.