Using stereo headphones, two tones at slightly different frequencies are received separately, one in each ear. The brain produces a phenomenon resulting in low-frequency pulsations in the amplitude and sound localization of the perceived sound.
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Beat Frequency of Sound Waves
Sounds of Waveforms
Marilyn F. Bishop (Virginia Commonwealth University, Department of Physics and Center for the Study of Biological Complexity, Richmond, Virginia)
Beating and Roughness
The Doppler Effect
Sounds from Amplitude and Frequency
Paul Christiano (The Harker School)
Superposition of Sound Waves
Resonance and Beats
Complex Addition of Harmonic Motions and the Phenomenon of Beats
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