On the relation between comodulation masking release and temporal modulation transfer functions
作者:
Bruce G. Berg,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1996)
卷期:
Volume 100,
issue 2
页码: 1013-1023
ISSN:0001-4966
年代: 1996
DOI:10.1121/1.416287
出版商: Acoustical Society of America
关键词: ACOUSTIC MEASUREMENTS;DATA PROCESSING;FILTERS;MODULATION;MASKING
数据来源: AIP
摘要:
Explanations for the phenomenon known as comodulation masking release (CMR) generally assume that temporal envelope information from different peripheral filters is compared, thus entailing multiple envelope representations. Here it is shown that a leaky‐integrator model, yielding a single envelope representation extracted from a broad frequency range, provides an alternative account of CMR. One prediction obtained from model simulations is that adding a single tone to the stimulus will disrupt the CMR effect, leading to an increase in thresholds. Supporting evidence from several experiments shows that the magnitude of CMR is reduced following the addition of a single tone, even when separated from comodulated masking and flanking bands by more than an octave. Whereas these findings are consistent with the leaky‐integrator model, they cannot be easily explained by models which assume multiple envelope representations.
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