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Title: Noise In The Regulating Station
Author: George S. Daves
Source: 1976 Appalachian Gas Measurement Short Course
Year Published: 1976
Abstract: Sound is what we hear. Sound is produced by the transfer of mechanical vibration or disturbance to air. When an object moves or vibrates, it disturbs the air particles near the object producing a variation in normal atmospheric pressure. As this pressure variation reaches our eardrums, they too are set to vibrating and this is translated by our hearing mechanism into the sensation called sound. Sound is a passing transitent disturbance of particles, either in a gas, liquid, or solid. Noise is disagreeable or undesired sound as compared to speech or music which are usually desired sounds. In addition to being annoying or irritating, long exposure to excessive noise will cause permanent loss of hearing.

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