Steinmetzger, K;
Rosen, S;
(2018)
The role of envelope periodicity in the perception of masked speech with simulated and real cochlear implants.
Journal of the Acoustical Society of America
, 144
(2)
pp. 885-896.
10.1121/1.5049584.
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Abstract
In normal hearing, complex tones with pitch-related periodic envelope modulations are far less effective maskers of speech than aperiodic noise. Here, it is shown that this masker-periodicity benefit is diminished in noise-vocoder simulations of cochlear implants (CIs) and further reduced with real CIs. Nevertheless, both listener groups still benefitted significantly from masker periodicity, despite the lack of salient spectral pitch cues. The main reason for the smaller effect observed in CI users is thought to be an even stronger channel interaction than in the CI simulations, which smears out the random envelope modulations that are characteristic for aperiodic sounds. In contrast, neither interferers that were amplitude-modulated at a rate of 10 Hz nor maskers with envelopes specifically designed to reveal the target speech enabled a masking release in CI users. Hence, even at the high signal-to-noise ratios at which they were tested, CI users can still exploit pitch cues transmitted by the temporal envelope of a non-speech masker, whereas slow amplitude modulations of the masker envelope are no longer helpful.
Type: | Article |
---|---|
Title: | The role of envelope periodicity in the perception of masked speech with simulated and real cochlear implants |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1121/1.5049584 |
Publisher version: | http://dx.doi.org/10.1121/1.5049584 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Science & Technology, Technology, Life Sciences & Biomedicine, Acoustics, Audiology & Speech-Language Pathology, NORMAL-HEARING LISTENERS, MODULATION FREQUENCY DISCRIMINATION, STEADY BACKGROUND-NOISE, FUNDAMENTAL-FREQUENCY, TEMPORAL-ENVELOPE, VOWEL IDENTIFICATION, UNDERSTANDING SPEECH, SENTENCE RECOGNITION, FLUCTUATING MASKERS, HARMONIC COMPLEXES |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Speech, Hearing and Phonetic Sciences |
URI: | https://discovery.ucl.ac.uk/id/eprint/10057772 |
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