Title: In-phase amplitude modulation on different numbers of electrodes
Abstract: It is known that fine temporal information is important for pitch perception. However, current commercial speech processors discard most fine temporal information other than amplitude modulation. The amplitude modulation outputted from the processing strategies is often out of phase, reducing their effectiveness as a pitch cue. In two experiments, we examine if presenting in-phase amplitude modulations on multiple electrodes improves the detection and discrimination of the rate of modulation. The data suggest that for all subjects, both detection and discrimination are improved when the amplitude modulation is presented in-phase on either three or five electrodes relative to presentation only on one electrode. However, no improvements were observed when increasing the number of electrodes with amplitude modulation from 3 to 5. These results suggest that in-phase amplitude modulation on a few electrodes can be used as a method for improving the perception of fine temporal information.
Publication Year: 2004
Publication Date: 2004-11-01
Language: en
Type: article
Indexed In: ['crossref']
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