ISO 11094:1991, Acoustics - Test code for the measurement of

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Air cavities exhibit a single resonant frequency called a Helmholtz resonance. The wavelength of a 50 000 Hz sound wave in air (speed of approximately 340 m/s) can be calculated as follows The wavelength of the 50 000 Hz sound wave (typical for a bat) is approximately 0.7 centimeters, smaller than the dimensions of a typical moth. Acoustical frequency is usually expressed in units of Hertz (Hz) where one Hz is equal to one cycle per second. Health hazards also result from extended exposure to vibration.

Pages: 24

Publisher: Multiple. Distributed through American National Standards Institute (ANSI) (August 23, 2007)

ISBN: B000Y2U5KO

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