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Title: Elements Of Sound And Sound Measurement
Author: Chalmus E. Allen
Source: 1975 International School of Hydrocarbon Measurement
Year Published: 1975
Abstract: If a tree falls in the forest and there is no one to hear it, is there any sound? This often argued question might be rephrased by asking, Your company has a regulator which is passing ten million cubic feet of natural gas per hour and cutting the pressure from 600 psig to 100 psig. If the occupant of a nearby house doesnt complain, is there any noise? Unless some very good acoustical engineering has been done, you can bet there is noise and you had better do something about it before someone who isnt deaf moves into the house. You would best start out by conducting a thorough noise survey to determine the extent and nature of the problem. After the survey you can evaluate all of the conditions and plausible alternatives and arrive at a solution. If the survey and evaluation are done thoroughly, you may find the right solution the first time around. This paper will discuss some fundamentals which will aid the measurement engineer in understanding sound and how to measure it.

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