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Title: Elements Of Sound And Sound Measurement
Author: Robert H. Welker
Source: 1978 International School of Hydrocarbon Measurement
Year Published: 1978
Abstract: Everyone these days has heard the word decibel, but hardly anyone knows what it means. It sounds like an accoustical equivalent Lo a teim like Candle tower that hay uomuthlny Lo du with Lilts auuml of bells. This is not the case, except that the. word decibel is named after Alexander Graham Bell, the inventor of the telephone. A decibel is not a unit of anything in the way that miles, pounds or volts are. A decibel is a ratio in the same way that San Francisco ia fifty timea a3 far away from San Antonio, Texas as Houston is from San Antonio, Texas. The fifty units is not of anything in particular, but merely a ratio.

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