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Directional measurement of airborne sound transmission paths using a spherical microphone array

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Subjectsound transmission, speech security, microphone array; Speech security
Abstract
A spherical microphone array has been used to perform directional measurements of airbornesound transmission between rooms. With a source and array on opposite sides of a wall,omnidirectional impulse responses were measured to each of the array microphones.Beamforming resulted in a set of directional impulse responses, which were analyzed to find thedistribution of arriving sound energy at the array position during various time ranges. Weakspots in the separating wall are indicated as directions of increased arriving sound energy. Thesystem was able to identify minor defects in a test wall in between two reverberation chambers,and also to identify leaks in the wall of an actual meeting room.
Publication date
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  • Journal of the Audio Engineering Society 53, no. 9 (1 September 2005): 787–795.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 47306
NRC-IRC-16495
NPARC number20378195
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Record identifier681029e5-db63-4592-8c22-54d4fe7d6217
Record created2012-07-24
Record modified2020-04-07
Date modified: