Document Detail

Effects of non-simultaneous masking on the binaural masking level difference.
MedLine Citation:
PMID:  21361448     Owner:  NLM     Status:  MEDLINE    
The present study sought to clarify the role of non-simultaneous masking in the binaural masking level difference for maskers that fluctuate in level. In the first experiment the signal was a brief 500-Hz tone, and the masker was a bandpass noise (100-2000 Hz), with the initial and final 200-ms bursts presented at 40-dB spectrum level and the inter-burst gap presented at 20-dB spectrum level. Temporal windows were fitted to thresholds measured for a range of gap durations and signal positions within the gap. In the second experiment, individual differences in out of phase (NoSπ) thresholds were compared for a brief signal in a gapped bandpass masker, a brief signal in a steady bandpass masker, and a long signal in a narrowband (50-Hz-wide) noise masker. The third experiment measured brief tone detection thresholds in forward, simultaneous, and backward masking conditions for a 50- and for a 1900-Hz-wide noise masker centered on the 500-Hz signal frequency. Results are consistent with comparable temporal resolution in the in phase (NoSo) and NoSπ conditions and no effect of temporal resolution on individual observers' ability to utilize binaural cues in narrowband noise. The large masking release observed for a narrowband noise masker may be due to binaural masking release from non-simultaneous, informational masking.
Emily Buss; Joseph W Hall Iii
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
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:
Created Date:  2011-03-02     Completed Date:  2011-06-20     Revised Date:  2013-06-30    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  907-19     Citation Subset:  IM    
Department of Otolaryngology∕Head and Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina 27599, USA.
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MeSH Terms
Acoustic Stimulation
Audiometry, Pure-Tone
Auditory Perception*
Auditory Threshold
Middle Aged
Noise / adverse effects*
Observer Variation
Perceptual Masking*
Reproducibility of Results
Signal Detection, Psychological*
Time Factors
Time Perception*
Young Adult
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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