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Workshop on the Auditory Basis of Speech PerceptionKeele University, UK |
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Workshop on the Auditory Basis of Speech PerceptionKeele University, UK |
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This study aims at optimizing the presentation of speech signals in the severely reduced dynamic range of the profoundly hearing impaired by means of multichannel compression and amplification. Compression was performed in six 1-oct channels, using compression ratios (CR) of 1, 2, 3, or 5, and a compression threshold of 35 dB below peak level. The CR per channel was varied in 8 conditions. Sentences were presented auditory-visually to 16 profoundly hearing impaired subjects and syllable intelligibility was measured. Results show that all auditory signals are valuable supplements to lipreading. No overall preference is found for any of the conditions, but high CRs (> 3-5) have a significantly detrimental effect. Inspection of the individual results reveals that compression may be beneficial for one subject.
Bibliographic reference. Drullman, Rob / Smoorenburg, Guido F. (1996): "Effect of multichannel compression on auditory-visual speech reception by the profoundly hearing impaired", In ABSP-1996, 257-260.