期刊
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
卷 136, 期 3, 页码 1225-1236出版社
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.4890649
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资金
- National Institutes of Health [R01 DC004786, R01 DC004786-08S1, R21 DC011905]
- EPSRC [EP/D034809/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D034809/1] Funding Source: researchfish
Intelligibility of a target voice improves when its fundamental frequency (F0) differs from that of a masking voice, but it remains unclear how this masking release (MR) depends on the two relative F0s. Three experiments measured speech reception thresholds (SRTs) for a target voice against different maskers. Experiment 1 evaluated the influence of target F0 itself. SRTs against white noise were elevated by at least 2 dB for a monotonized target voice compared with the unprocessed voice, but SRTs differed little for F0s between 50 and 150 Hz. In experiments 2 and 3, a MR occurred when there was a steady difference in F0 between the target voice and a stationary speech-shaped harmonic complex or a babble. However, this MR was considerably larger when the F0 of the masker was 11 semitones above the target F0 than when it was 11 semitones below. In contrast, for a fixed masker F0, the MR was similar whether the target F0 was above or below. The dependency of these MRs on the masker F0 suggests that a spectral mechanism such as glimpsing in between resolved masker partials may account for an important part of this phenomenon. (C) 2014 Acoustical Society of America.
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