Abstract
This paper presents the results of an experimental study of sound pressures in apertured hard wall cavities, 2.5 cm in diameter and depths varying from 0.3 to 1.5 cm, as a function of cavity dimension, length and diameter of aperture and frequency of the sound. The results are given in decibels increase of sound pressure level over the pressure at the face of an imperforate baffle. Curves showing resonance frequencies as functions of aperture and cavity dimensions are shown. No theoretical explanation is offered.
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