| Effects of intensity on speech recognition in high- and low-frequency bands. | |
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MedLine Citation:
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PMID: 7895941 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: This study investigated the intensive effects of a low-frequency (200 to 400 Hz) and a high-frequency (1000 to 5000 Hz) band of speech presented jointly and in isolation. DESIGN: Each band was presented at a reference intensity level equivalent to the average normal conversational level. To investigate intensive effects, the low-frequency band was presented at 20 dB and 36 dB, and the high-frequency band at 20 dB above the reference level. Each band was presented at a fixed signal-to-noise ratio. Subjects were four normal-hearing adult females. The AI was used to predict performances and to determine audibility of each band. RESULTS: The best performance occurred for a joint band presentation with each band at the reference level. Increasing intensity of one band by 20 dB, for joint band conditions, did not significantly affect performance. However, increasing the low-frequency band by 36 dB or both bands by 20 dB resulted in a significant decrease in performance. CONCLUSIONS: Reduced performance with the low-frequency band at 36 dB and the high-frequency band at the reference level is attributed primarily to upward spread of masking by speech. Performance decrements for other joint band conditions are attributed to combined effects of high intensity. |
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Authors:
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E L Goshorn; G A Studebaker |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Ear and hearing Volume: 15 ISSN: 0196-0202 ISO Abbreviation: Ear Hear Publication Date: 1994 Dec |
Date Detail:
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Created Date: 1995-04-26 Completed Date: 1995-04-26 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8005585 Medline TA: Ear Hear Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 454-60 Citation Subset: IM |
Affiliation:
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Louisiana Tech University, Department of Speech, Ruston. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Female Humans Speech Reception Threshold Test* Task Performance and Analysis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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