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Auditory and auditory-visual intelligibility of speech in fluctuating maskers for normal-hearing and hearing-impaired listeners.
J Acoust Soc Am. 2009 May; 125(5):3358-72.JA

Abstract

Speech intelligibility for audio-alone and audiovisual (AV) sentences was estimated as a function of signal-to-noise ratio (SNR) for a female target talker presented in a stationary noise, an interfering male talker, or a speech-modulated noise background, for eight hearing-impaired (HI) and five normal-hearing (NH) listeners. At the 50% keywords-correct performance level, HI listeners showed 7-12 dB less fluctuating-masker benefit (FMB) than NH listeners, consistent with previous results. Both groups showed significantly more FMB under AV than audio-alone conditions. When compared at the same stationary-noise SNR, FMB differences between listener groups and modalities were substantially smaller, suggesting that most of the FMB differences at the 50% performance level may reflect a SNR dependence of the FMB. Still, 1-5 dB of the FMB difference between listener groups remained, indicating a possible role for reduced audibility, limited spectral or temporal resolution, or an inability to use auditory source-segregation cues, in directly limiting the ability to listen in the dips of a fluctuating masker. A modified version of the extended speech-intelligibility index that predicts a larger FMB at less favorable SNRs accounted for most of the FMB differences between listener groups and modalities. Overall, these data suggest that HI listeners retain more of an ability to listen in the dips of a fluctuating masker than previously thought. Instead, the fluctuating-masker difficulties exhibited by HI listeners may derive from the reduced FMB associated with the more favorable SNRs they require to identify a reasonable proportion of the target speech.

Authors+Show Affiliations

Army Audiology and Speech Center, Walter Reed Army Medical Center, Washington, DC 20307, USA. joshua.bernstein@amedd.army.milNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19425676

Citation

Bernstein, Joshua G W., and Ken W. Grant. "Auditory and Auditory-visual Intelligibility of Speech in Fluctuating Maskers for Normal-hearing and Hearing-impaired Listeners." The Journal of the Acoustical Society of America, vol. 125, no. 5, 2009, pp. 3358-72.
Bernstein JG, Grant KW. Auditory and auditory-visual intelligibility of speech in fluctuating maskers for normal-hearing and hearing-impaired listeners. J Acoust Soc Am. 2009;125(5):3358-72.
Bernstein, J. G., & Grant, K. W. (2009). Auditory and auditory-visual intelligibility of speech in fluctuating maskers for normal-hearing and hearing-impaired listeners. The Journal of the Acoustical Society of America, 125(5), 3358-72. https://doi.org/10.1121/1.3110132
Bernstein JG, Grant KW. Auditory and Auditory-visual Intelligibility of Speech in Fluctuating Maskers for Normal-hearing and Hearing-impaired Listeners. J Acoust Soc Am. 2009;125(5):3358-72. PubMed PMID: 19425676.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Auditory and auditory-visual intelligibility of speech in fluctuating maskers for normal-hearing and hearing-impaired listeners. AU - Bernstein,Joshua G W, AU - Grant,Ken W, PY - 2009/5/12/entrez PY - 2009/5/12/pubmed PY - 2009/8/14/medline SP - 3358 EP - 72 JF - The Journal of the Acoustical Society of America JO - J Acoust Soc Am VL - 125 IS - 5 N2 - Speech intelligibility for audio-alone and audiovisual (AV) sentences was estimated as a function of signal-to-noise ratio (SNR) for a female target talker presented in a stationary noise, an interfering male talker, or a speech-modulated noise background, for eight hearing-impaired (HI) and five normal-hearing (NH) listeners. At the 50% keywords-correct performance level, HI listeners showed 7-12 dB less fluctuating-masker benefit (FMB) than NH listeners, consistent with previous results. Both groups showed significantly more FMB under AV than audio-alone conditions. When compared at the same stationary-noise SNR, FMB differences between listener groups and modalities were substantially smaller, suggesting that most of the FMB differences at the 50% performance level may reflect a SNR dependence of the FMB. Still, 1-5 dB of the FMB difference between listener groups remained, indicating a possible role for reduced audibility, limited spectral or temporal resolution, or an inability to use auditory source-segregation cues, in directly limiting the ability to listen in the dips of a fluctuating masker. A modified version of the extended speech-intelligibility index that predicts a larger FMB at less favorable SNRs accounted for most of the FMB differences between listener groups and modalities. Overall, these data suggest that HI listeners retain more of an ability to listen in the dips of a fluctuating masker than previously thought. Instead, the fluctuating-masker difficulties exhibited by HI listeners may derive from the reduced FMB associated with the more favorable SNRs they require to identify a reasonable proportion of the target speech. SN - 1520-8524 UR - https://www.unboundmedicine.com/medline/citation/19425676/Auditory_and_auditory_visual_intelligibility_of_speech_in_fluctuating_maskers_for_normal_hearing_and_hearing_impaired_listeners_ L2 - https://doi.org/10.1121/1.3110132 DB - PRIME DP - Unbound Medicine ER -