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Title: Noise-A Costly And Unnecessary Pollutant
Author: Lyle F. Verges
Source: American Gas Association 1973
Year Published: 1973
Abstract: It is ironic that during a period of an alleged energy crisis, a form of waste energy associated with the production, transmission, and use of gas should become a pollutant. We are referring, of course, to noise-unwanted sound. As most of us know, sound is a form of mechanical energy, a vibration in an elastic medium. Sound exists objectively, without regard to any observer or receiver. What turns sound into noise is its becoming unwanted. That makes noise a subjective thing -a form of unwanted energy. Unfortunately, there is no economical or practical means of amverting noise into useful energy. Furthermore, the energy involved in even very loud noises is quite trivial the level of loud, shouting speech (just above the OSHA 90 dBA limit) is only about 0.001 W. Even a relatively large reciprocating engine produces less than iOO W of acoustic power under normal conditions of operation. Why, then, should we be at all concerned about noise?

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