Abstract
Our previous data [Nelson et al., ASA (2001)] indicated that users of cochlear implants experience little release from masking when listening to speech in modulated maskers. Although normal-hearing listeners take advantage of temporal dips in modulated maskers, cochlear implant users do not. The current study investigated listeners with normal hearing and cochlear implants for their understanding of speech in the presence of a single-talker masker. Participants listened to IEEE sentence material spoken clearly at a slow rate (3.5 syllables per second) by either a male (average F0=110 Hz) or a female (average F0=210 Hz) talker. Maskers included continuous speech from other male and female talkers spoken at both slow and fast rates. Results from normal-hearing listeners indicated that when the signal and masker had a similar F0 and rate, identification was poorer than when signal and masker differed in F0 and/or rate. The primary factor affecting performance was the F0 of the masker. It is hypothesized that cochlear implant users will not show the effect of talker/masker F0, but will show decreased performance when talker and masker have the same rate. Results from cochlear implant listeners will be reported. [Work supported by NIDCD P01DCD00110.]
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