Using a spherical microphone array for identification of airborne sound transmission paths

Bradford N. Gover

Abstract


The identification of airbone sound transmission path using a spherical microphone array was discussed. In the new technique ASTM E90 and E336 and ISO 140-3 and 140-4 provides means of rating the sound insulation performance of partitions in the laboratory or in the field. The present approach seems capable of identifying weak sports in a reliable and effective manner. The new technique was effective under condition of high reverberation and showed that the detectability of the defects varied with frequency.

Keywords


Absorption; Arrays; Computational geometry; Glass fibers; Loudspeakers; Natural frequencies; Reverberation; Sound insulation; Beam pattern; Measurement system; Microphone arrays; Sound transmission

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