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Pubmed for Handhelds

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  • Title: A single-microphone-based self-adaptive filter of noise from speech and its performance evaluation.
    Author: Graupe D, Grosspietsch JK, Basseas SP.
    Journal: J Rehabil Res Dev; 1987; 24(4):119-26. PubMed ID: 3430371.
    Abstract:
    This paper discusses a single-microphone-based self-adaptive filter of environmental noise from speech. This filter, based on the work of Graupe (3) and of Graupe and Causey (4), has been incorporated in standard in-the-ear (ITE) and in behind-the-ear (BTE) hearing aids by several hearing aid manufacturers. Intelligibility tests by the authors and by independent researchers are presented in this paper to illustrate the filter's performance. Significant monosyllabic-word-list intelligibility improvements are shown in hearing-impaired and in normal-hearing subjects for virtually any environmental noise, including white noise, babble (interfering background conversations), cafeteria noise, high-frequency noise, and low-frequency noise at signal-to-noise ratios to below -20 dB.
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