| Masking of low-frequency signals by high-frequency, high-level narrow bands of noise. | |
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MedLine Citation:
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PMID: 21361445 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Low-frequency masking by intense high-frequency noise bands, referred to as remote masking (RM), was the first evidence to challenge energy-detection models of signal detection. Its underlying mechanisms remain unknown. RM was measured in five normal-hearing young-adults at 250, 350, 500, and 700 Hz using equal-power, spectrally matched random-phase noise (RPN) and low-noise noise (LNN) narrowband maskers. RM was also measured using equal-power, two-tone complex (TC2) and eight-tone complex (TC8). Maskers were centered at 3000 Hz with one or two equivalent rectangular bandwidths (ERBs). Masker levels varied from 80 to 95 dB sound pressure level in 5 dB steps. LNN produced negligible masking for all conditions. An increase in bandwidth in RPN yielded greater masking over a wider frequency region. Masking for TC2 was limited to 350 and 700 Hz for one ERB but shifted to only 700 Hz for two ERBs. A spread of masking to 500 and 700 Hz was observed for TC8 when the bandwidth was increased from one to two ERBs. Results suggest that high-frequency noise bands at high levels could generate significant low-frequency masking. It is possible that listeners experience significant RM due to the amplification of various competing noises that might have significant implications for speech perception in noise. |
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Authors:
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Harisadhan Patra; Christina M Roup; Lawrence L Feth |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 129 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-03-02 Completed Date: 2011-06-20 Revised Date: 2012-02-01 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 876-87 Citation Subset: IM |
Affiliation:
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Department of Speech and Hearing Science, The Ohio State University, Columbus, Ohio 43210, USA. hpatra@bloomu.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adolescent Adult Analysis of Variance Audiometry, Pure-Tone Auditory Perception* Auditory Threshold Female Humans Male Noise / adverse effects* Perceptual Masking* Pressure Signal Detection, Psychological* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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R01-DC 006879/DC/NIDCD NIH HHS; T32 DC000013/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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