PSY100H1 Study Guide - Eardrum, Tensor Tympani Muscle, Tectorial Membrane
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PSY100H1 Full Course Notes
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Document Summary
Chapter 9 hearing physiology & psychoacoustics. Deafness deprives you of most fundamental human abilities communication through speech. Vibrations of object cause molecules in object"s surrounding medium to vibrate as well and vibration in turn causes pressure changes in medium. Pressure chances = waves and similar to waves on pond. Sound waves travel at particular speed depending on medium, moving faster through denser substances. Speed of sound through water is 1500 m/s. Light waves move through air almost a million times faster than sound waves. When jet plane travels faster than speed of sound, place catches up to and passes fronts of sound waves it"s creating result is that sound waves combine into shock wave, or huge pressure fluctuation sonic boom. Basic qualities of sound waves: frequency and amplitude. Magnitude of pressure chance in sound wave difference between highest pressure area and lowest pressure area. Amplitude: magnitude of displacement (increase or decrease) of sound pressure wave or of head movement.
