Proc. of the International Conf. on Spoken Language Processing (ICSLP), Vol. 3, pp. 586-589, Beijing, 2000

Designing modulation filters for improving speech intelligibility in reverberant environments

T. Kitamura, K. Kinoshita, T. Arai, A. Kusumoto and Y. Murahara

Abstract: In this paper, we propose a new technique to design modulation filters to reduce degradation of speech intelligibility in reverberant environments. Using the inverse modulation transfer function, we design data-derived modulation filters for each speech frequency band. These filters preprocess speech signals between a microphone and a loudspeaker that radiates speech into a performance hall. Using our modulation filters, we conducted perceptual experiments with one hearing-impaired subject and two subjects with normal hearing. Test results indicate that our proposed method improves the intelligibility of reverberant speech.

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