OHS 508 Chapter Notes - Chapter 8: Stapes, Logarithmic Scale, Dimensionless Quantity
9 Jun 2016
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Document Summary
Sound is produced by a vibrating object which sets up a corresponding series of pressure fluctations in the air molecules, which then move in the form of waves with alternating compressions and rarefactions. Sound waves travel outward from the source in all directions, normally through a gaseous medium. Sound waves may move through solid or liquid medium but may be reflected, diffracted, or even undergo interferences as they hit each other or another form of energy. Sound waves have two main characteristics, which are frequency and amplitude. Measured in cycles per second (cps) or hertz (hz) Sound wave"s frequency is related to the wavelength (lambda) Speed of sound is a constant in a given medium and temperature: sound waves travel in the air 344 m per second at 20 degrees celsius. The wavelength is inversely proportional to the frequency wavelength is long, the frequency of the sound wave is low and vice versa.
