Mobile Science - AudioSpectrum
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About this app
AudioSpectrum displays the frequency spectrum of a WAV file or audio sourced from AudioTime or AudioTime+.
The spectrum is displayed in linear and logarithmic scales.
* Panning and zooming allow exploration of the fine details of the spectrum.
* Ensemble spectral averaging is used to construct the spectrum of continuous audio too large for a single FFT transformation.
The application is designed for use in science education experiments that:
* investigate the frequency components of sound,
* determine the dominant frequency of audio.
Screen shots illustrate Doppler shift of sound source swinging on a pendulum.
* First shot of stationary sound source spectrum centered closely around dominant frequency of 1838.
* Second shot of moving sound source spectrum with lower frequencies as source recedes from microphone and higher frequencies as source approaches microphone.
The spectrum is displayed in linear and logarithmic scales.
* Panning and zooming allow exploration of the fine details of the spectrum.
* Ensemble spectral averaging is used to construct the spectrum of continuous audio too large for a single FFT transformation.
The application is designed for use in science education experiments that:
* investigate the frequency components of sound,
* determine the dominant frequency of audio.
Screen shots illustrate Doppler shift of sound source swinging on a pendulum.
* First shot of stationary sound source spectrum centered closely around dominant frequency of 1838.
* Second shot of moving sound source spectrum with lower frequencies as source recedes from microphone and higher frequencies as source approaches microphone.
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