pxt-calliope/docs/reference/input/sound-level.md

sound Level

Find out what the the level of sound heard by the microphone is.

input.soundLevel()

Returns

• a number between 0 (low sound) and 255 (loud sound) which tells how loud the sounds are that the microphone hears.

Example

Show a checkerboard icon while the sound level is greater than 100.

basic.forever(function () {
    if (input.soundLevel() > 100) {
        basic.showIcon(IconNames.Chessboard)
    } else {
        basic.clearScreen()
    }
})

See also

microphone