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.)
Topic: Acoustics
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.
Use the microphone do determine a Doppler shift from a given base frequency. Continue reading “Doppler effect”
Continuously determine the frequency recorded by the microphone and plot a history of this frequency over time.
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Turns your phone into a sonar to either measure distances or determine the speed of sound.
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Using the acoustic stopwatch you can determine the speed of sound with two phones and a tape measure.
Generates a sine tone of a given frequency and outputs it through the speaker.