In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 72, No. S1 ( 1982-11-01), p. S67-S67
Abstract:
The combination of a 1000-Hz forward masker and a broadband simultaneous masker produces more masking than would be predicted from the sum of their individual effects [Jesteadt and Wilke, J. Acoust. Soc. Am. Suppl. 1 71, S72 (1982)]. We have extended the original study to include forward maskers above and below the signal in frequency. We measured the threshold for a 1000-Hz signal as a function of masker level (30 to 80 dB SPL) for forward masker frequencies from 600 to 1200 Hz (100-Hz steps below the signal, 50-Hz steps above) with the signal and masker presented in quiet and in an 8-dB No background noise. Nonadditivity was greatest when the forward masker and signal were similar in frequency. We also obtained psychophysical tuning curves for a 45-dB SPL, 1000-Hz signal using forward maskers from 600 to 1200 Hz, with the signal and masker presented in quiet and in noise. As reported by Green et al. [J. Acoust. Soc. Am. 69, 1758–1762 (1981)] , the forward-masked tuning curves were sharper in noise, presumably because the non-additivity of the two maskers was greatest in the region of the tip of the tuning curve. If the background noise produced an increase in masking by restricting off-frequency listening, we would predict greater nonadditivity when the signal and masker differed in frequency as well as broader tuning curves in noise than in quiet. [Work supported by NIH and NSF.]
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1982
detail.hit.zdb_id:
1461063-2
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