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

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ConferenceAudio Engineering Society 117th Convention: 28 October 2004, San Francisco, CA., U.S.A.
Pages111; # of pages: 11
Subjectsound transmission, speech privacy, microphone array; Sound transmission & insulation
AbstractA spherical microphone array has been used to perform directional measurements of airborne sound 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 the distribution of arriving sound energy at the array position during various time ranges. Weak spots in the separating wall are indicated as directions of increased arriving sound energy. The system 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
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number48315
NPARC number20378120
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Record identifier3a702211-5337-49a1-b636-a235a74e2d1f
Record created2012-07-24
Record modified2016-05-09
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