Journal article

The effect of presentation level and stimulation rate on speech perception and modulation detection for cochlear implant users

Tim Brochier, Hugh J McDermott, Colette M Mckay

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA | ACOUSTICAL SOC AMER AMER INST PHYSICS | Published : 2017

Abstract

In order to improve speech understanding for cochlear implant users, it is important to maximize the transmission of temporal information. The combined effects of stimulation rate and presentation level on temporal information transfer and speech understanding remain unclear. The present study systematically varied presentation level (60, 50, and 40 dBA) and stimulation rate [500 and 2400 pulses per second per electrode (pps)] in order to observe how the effect of rate on speech understanding changes for different presentation levels. Speech recognition in quiet and noise, and acoustic amplitude modulation detection thresholds (AMDTs) were measured with acoustic stimuli presented to speech p..

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Grants

Funding Acknowledgements

We are grateful to our dedicated participants, who graciously volunteered time and energy in many test sessions. T.B. is sponsored by the Melbourne International Research Scholarship and the Melbourne International Fee Remission Scholarship. The research was supported by a Veski Fellowship to C.M.M. The Bionics Institute acknowledges support it receives from the Victorian Government through its Operational Infrastructure Support Program.