Modelling Auditory Processing and Organisation

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Cambridge University Press, Feb 17, 2005 - Computers - 136 pages
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We are surrounded by noise; we must be able to separate the signals we want to hear from those we do not. To overcome this 'cocktail party effect' we have developed various strategies; endowing computers with similar abilities would enable the development of devices such as intelligent hearing aids and robust speech recognition systems. This book describes a system which attempts to separate multiple, simultaneous acoustic sources using strategies based on those used by humans. It is both a review of recent work on the modelling of auditory processes, and a presentation of a new model in which acoustic signals are decomposed into elements. These structures are then re-assembled in accordance with rules of auditory organisation which operate to bind together elements that are likely to have arisen from the same source. The model is evaluated by measuring its ability to separate speech from a wide variety of other sounds, including music, phones and other speech.

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physiology function and a computer model
Auditory representations
Modelling auditory scene exploration
Implementation of auditory grouping principles
An evaluation of sound source separation in the model
Conclusions and future development
B Derivations relating to the hair cell model

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Page 112 - D (1984) Graded and nonlinear mechanical properties of sensory hairs in the mammalian hearing organ.
Page 110 - A Functional Model of Signal Processing in the Peripheral Auditory System", Acustica, 31, 349-353.

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