A simple experiment, which determines the amplitude of the signal recorded from the microphone. The amplitude is uncalibrated and has an arbitrary offset, but it can be calibrated by using a known reference signal. (You will find further informatiaon in the actual experiment.)

Calculates the autocorrelation of audio signals recorded with the microphone. The frequency of the signal is given, which only works reasonable for single-frequency signals.

View 10 ms segments of the raw audio data recorded by the microphone with oscilloscope-like edge triggering.

Calculates and displays the FFT of audio from the microphone. The strongest frequency is given as well.

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Turns your phone into a sonar to either measure distances or determine the speed of sound.