PSYB51H3 Chapter Notes - Chapter 9-15: Oval Window, Tas1R2, Abducens Nerve
8 Dec 2012
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Document Summary
Vibrations of an object cause its surrounding medium to vibrate as well and this vibration in turn causes pressure changes in the medium. Sound waves travel at a particular speed depending on medium, moving faster thru denser substances: sound travels faster in water than in air. Basic qualities of sound waves: frequency and amplitude. Amplitude or intensity: the magnitude of displacement of a sound pressure wave. Frequency: for sound, the number of times per second that a pattern of pressure change repeats. Loudness: the psychological aspect of sound related to perceived intensity (amplitude) Low-frequency sounds correspond to low pitches and high-frequency sounds correspond to high pitches. Hertz (hz): a unit of measure for frequency. Pitch: the psychological aspect of sound related mainly to perceived frequency. Humans can detect sounds that vary from about 20 to 20,000 hz. Decibel (db): a unit of measure for the physical intensity of sound.
