PSYCO275 Chapter Notes - Chapter 10: Basilar Membrane, Sound, Fourier Analysis
14 Nov 2016
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Psyco275, chapter 10, midterm #2 review, textbook note. (the auditory system) Sound wave energy has three physical attributes- frequency, amplitude, and complexity, produced by the displacement of air molecules. A sound wave is a mechanical displacement of molecules caused by changing pressure that possesses the physical properties of frequency, amplitude, and complexity. Frequency is the number of cycles a wave completes in a given time. Hertz (hz) is the measure of sound wave frequency (repetition rate); 1 hertz equals 1 cycle per second. Amplitude is the stimulus intensity; in audition, roughly equivalent to loudness, graphed by the increasing height of a sound wave. Decibel (db) is the measure of the relative physical intensity of sounds. Fourier analysis is used to break down complex tones into pure tones. The fundamental frequency is the rate at which the complex waveform pattern repeats. Periodicity is the fundamental frequency that repeats at regular intervals. Prosody is the melodic tone of a speaker"s voice.
