PSY280H1 Lecture Notes - Lecture 9: Psychoacoustics, Sound Energy, Hair Cell
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PSY280H1 Full Course Notes
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Vibrations of an object cause molecules in the object s surrounding medium to vibrate as well, which causes pressure cha. Example: speed of sound through air is about 340 meters/second, but speed of sound through water is 1500 meters/s. Light travels a million times faster than sound. Amplitude: the magnitude of displacement of a sound pressure wave. Intensity: the amount of sound energy falling on a unit area. Frequency: for sound, the number of times per second that a pattern of pressure repeats. Sounds with the same intensity and fundamental frequency can still be perceived as different, this is related to differences in timbre. Hertz (hz): a unit of measure for frequency. Decibel (db): a unit of measure for the physical intensity of sound. Decibel (db): a unit of measure for the physical intensity of sound: Named after inventor of the telephone: alexander graham bell.
