Prosody perception in simulated cochlear implant listening in modulated and stationary noise

Forfattere

  • David Morris Institute for Scandinavian Studies and Linguistics, University of Copenhagen, Njalsgade 120, DK-2300, Denmark

Resumé

Cochlear Implant (CI) listeners can do well when attending to speech in quiet, yet challenging listening situations are more problematic. Previous studies have shown that fluctuations in the noise do not yield better speech recognition scores for CI listeners as they can do for normal hearing (NH) listeners. The aim of this experiment was to investigate the ability of simulated CI listeners in a prosodic task, where F0 Just Noticeable Differences (JND) were measured in modulated and stationary background noise. A nonsense sentence was created from a recording with durations and overall contour derived from non-scripted Danish speech. The F0 temporal midpoint of the initial syllable was varied stepwise in semitones. Competing signals of modulated white noise and speech shaped noise at 0 dB and 12 dB SNR, were added to the tokens prior to 8-channel noise- excited vocoder processing. Stimuli were presented diotically to 8 NH listeners in a 2AFC task. A question/statement identification experiment was also performed. Results from the JND experiment indicate a significant noise effect for the modulated noise condition at the lower SNR.

Referencer

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Yderligere filer

Publiceret

2011-12-15

Citation/Eksport

Morris, D. (2011). Prosody perception in simulated cochlear implant listening in modulated and stationary noise. Proceedings of the International Symposium on Auditory and Audiological Research, 3, 167–173. Hentet fra https://proceedings.isaar.eu/index.php/isaarproc/article/view/2011-20

Nummer

Årg. 3 (2011): Speech Perception and Auditory Disorders

Sektion

2011/1. Indicators of hearing impairment and measures of speech perception

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