The experiment “Acceleration (without g)” just gives the raw data from the phone’s (typically virtual) accelerometer.
Calculates and displays the FFT of acceleration data. The strongest frequency is given as well. This is a great tool to analyze vibrations.
The experiment “Acceleration with g” just gives the raw data from the phone’s accelerometer.
Measure the time between two or more sound events.
Continue reading “Acoustic Stopwatch”
A simple experiment, which determines the amplitude of the signal recorded from the microphone. The amoplitude is uncalibrated, so the data is scaled to a range from 0 to 1 (maximum amplitude of the device).
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.
Explore the relation of angular velocity and centrifugal acceleration using the gyroscope and the accelerometer. (For example when putting your phone into a salad spinner)
Use the microphone do determine a Doppler shift from a given base frequency. Continue reading “Doppler effect”