| The measurement of critical masking bands. | |
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MedLine Citation:
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PMID: 1186166 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The characteristics of the critical masking band, that spectral region of a wideband noise that is effective in masking a pure-tone signal, were inferred by measuring detectability (d) for tonal signals as a function of the cutoff frequency of a low-pass or high-pass noise masker. As the cutoff frequency of a low-pass noise was decreased from the wide-band (100-7000 Hz) condition toward the signal frequency, (500, 1000, or 4000 Hz) dectability maintained a constant minimum until a further reduction in cutoff frequency increased detectability, presumably due to a reduction in masker power within the critical band. As cutoff frequency was reduced further, detectability increased monotonically until detection reached 100%. This usually occurred when the cutoff frequency is 0.04 to 0.06 octaves below the signal frequency. The range of cutoff frequencies over which detectability changes occurred defines the critical masking band. These ranges correspond closely to well-known critical ratio data. The dependence of d on noise cutoff frequency did not differ at the two signal levels (15 and 25 dB SL) used in this experiment. The critical band appeared symmetrical about the signal frequency for most subjects and most experimental conditions, although some subjects displayed a marked asymmetry in the high frequency direction for some conditions. |
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Authors:
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R H Margolis; A M Small |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of speech and hearing research Volume: 18 ISSN: 0022-4685 ISO Abbreviation: J Speech Hear Res Publication Date: 1975 Sep |
Date Detail:
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Created Date: 1976-01-17 Completed Date: 1976-01-17 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0376336 Medline TA: J Speech Hear Res Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 571-87 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation
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instrumentation,
methods Humans Perceptual Masking* Psychoacoustics* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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