San Francisco : Architect and Engineer, Inc · leaf 417
object, and these pressurechanges are transmitted in waves by the mediumto all points in the vicinity of the sound source.Thus a sound wave exerts a definite pressure onany object, such as a human ear drum, locatedin the sound field. As a standard, scientists haveagreed upon a barely audible sound… … How noise is analyzed during the flight of airplanes.W. O. Osbon, engineer at the left, is conducting a noiseanalysis on the GA-43, new high speed air liner of theGeneral Aviation Corporation. units this sound pressure is equivalent to aboutthree billionths of a pound per square inch. There is a…
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