Transcription of The Physics of Sound - Western Michigan University
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The Physics of Sound - Western Michigan University
The Physics of Sound 1 The Physics of Sound Sound lies at the very center of speech communication. A Sound wave is both the end product of the speech production mechanism and the primary source of raw material used by the listener to recover the speaker's message. Because of the central role played by Sound in speech communication, it is important to have a good understanding of how Sound is produced, modified, and measured. The purpose of this chapter will be to review some basic principles underlying the Physics of Sound , with a particular focus on two ideas that play an especially important role in both speech and hearing: the concept of the spectrum and acoustic filtering. The speech production mechanism is a kind of assembly line that operates by generating some relatively simple sounds consisting of various combinations of buzzes, hisses, and pops, and then filtering those sounds by making a number of fine adjustments to the tongue, lips, jaw, soft palate, and other articulators.
0 5 10 15 20 25 30 35 40 45 50-10-5 0 5 10 Time (ms) Instantaneous Amp. -10-5 0 5 10 Instantaneous Amp. present context, the term amplitude refers to the magnitude of the displacement pattern.
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