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Title: An investigation into improving speech intelligibility using binaural signal processing
Author: Spittle, Gary
ISNI:       0000 0004 2720 6666
Awarding Body: University of York
Current Institution: University of York
Date of Award: 2009
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This thesis sets out to improve the intelligibility of a target speech sound source when presented with simultaneous masking sounds. A summary of the human hearing system and methods for spatialising sounds is provided as background to the problem. A detailed review of relevant research in auditory masking, auditory continuity and speech intelligibility is discussed. Angular separation and sound object differentiation through amplitude modification are used to enhance a target speech sound. A novel method is developed for achieving this using only the binaural signals received at the ears of a listener. This new approach is termed an auditory lens. Psychoacoustic evaluation of the auditory lens processing has shown comparable intelligibility scores to direct spatialisation techniques which require prior knowledge of sound source spectral content and direction. The success of the auditory lens has led to a number of potential further research projects that will take the processing system closer to a real wearable product.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available