Attenuation of traveling acoustic shock waves in tubes
Bielicki, Theodore C.
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The attenuation of fully developed, traveling, acoustic shock waves was studied with particular emphasis placed on obtaining reproducible results and extending the range of observation. High intensity sound waves produced by a siren were propagated in a 5.4 cm radius tube treated to eliminate reflection from the downstream end. After reaching a stable wave form the decay of the acoustic shock wave was measured over a distance of 4.5 m by means of a traveling microphone. The frequencies used were between 610 and 1130 cps resulting in a ratio of wavelength to tube radius of from 10 to 5. The pressure jump across the shock wave was from 1/35 to 1/8 atmosphere. Both of these ranges extend into previously uninvestigated regions.