LING 1001 Lecture Notes - Mouth, Spectrogram, Vocal Folds
6 Mar 2014
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Document Summary
Looking at the physical aspects of the sound wave (acoustic characteristics of the sounds: what is a sound wave, disturbance in the air set off by a movement. Vibration: violin strings, vocal folds, not permanent, how, air molecules that want to keep a comfortable distance from each other. One moves to right, the other move to the right as well. Compression = molecules are more crowded together than usual. Rarefaction = molecules are spread farther apart than usual. Periodic wave = sound wave that repeats at regular intervals. 20 20 000 hz = perceived as sound. Highest frequency of telephone: 3 500 hz: very little essential information is lost. Complex sound waves: simple sound waves at single frequencies that combine. See figure 3, p. 71: sound wave produced by vocal folds = complex wave. Repeats itself at the frequency of the opening and closing of the vocal folds: set of harmonics.
