... middle of paper ...
... study was to assess the perceptual attributes of F0 that are most important to providing EAS benefit for monaural listening. To address this, we determined the extent to which speech recognition improved for normal-hearing listeners when they were listening to vocoded speech in a multi-talker babble background and a manipulated acoustical tone was added to the vocoded speech with a frequency corresponding to the instantaneous fundamental frequency of the speech signal (F0). In particular, the influence of a decrease in frequency selectivity for the additional tone was investigated. This was done by changing (1) the frequency specificity (replacing the pure tone by a narrowband noise signal centered at F0), (2) the frequency range of F0 (the modulation depth of the F0-contour), and (3) the absolute value of F0 (by down-shifting F0 in frequency with a constant value).
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