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Spatial audio and room acoustics.
J. Acoust. Soc. Am. Volume 129, Issue 4, pp. 2429-2429 (2011); (1 page)
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Add to FacebookSchroeder’s interest in the behavior of sound in small enclosures eventually lead to the use of statistical methods of digital signal processing to estimate and track a room’s response for echo control. He showed that a small frequency shift (5 Hz) in a loudspeaker‐enclosure‐microphone system could be used to mitigate the coupling feedback in public address systems. He also employed frequency shifting for echo and feedback control in the first stereo teleconferencing system. We use many of the results from the early work on stereo teleconferencing in developing solutions for multichannel, immersive systems. Schroeder’s work on simulating room acoustics form the fundamentals of how we simulate and test new algorithms. His work on stereo reproduction and perception forms the basis for our motivation to explore multichannel systems (specifically, the spatial release from masking effects). The work on frequency shifting in public address systems was a first attempt at a problem that research is still focused on, multichannel acoustic echo cancellation, which addresses the howling feedback and echo that results from a loudspeaker‐enclosure‐microphone system.
© 2011 Acoustical Society of America
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Room acoustics: theory and experiment; reverberation, normal modes, diffusion, transient and steady-state response
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