Perception of Speech in Context by Listeners With Healthy and Impaired Hearing

MI-összefoglaló

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The trial is looking for adults with normal hearing, with hearing loss, or who use a cochlear implant. They must understand and speak North American English well.

Életkor

18 to 65 years

Nem

All sexes

A betegség stádiuma

Hearing thresholds below 25 dB HL, or not more than 40 dB HL, or not more than 55 dB HL, at 250 to 8000 Hz. People who use a cochlear implant can also join.

A részvétel fő kizáró okai

• Cannot recognize spoken words in English
• Not a competent speaker of North American English
• Younger than 18 or older than 65 years
• Hearing thresholds above the limits set by the trial
• Language-learning or other cognitive disabilities

A regiszter feltételei, szó szerint

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• 18 és 65 év között vagy?IgenNem

Mit akar kideríteni a vizsgálat

Recognition of speech sounds is accomplished through the use of adjacent sounds in time, in what is termed acoustic context. The frequency and temporal properties of these contextual sounds play a large role in recognition of human speech. Historically, most research on both speech perception and sound perception in general examine sounds out-of-context, or presented individually. Further, these studies have been conducted independently of each other with little connection across labs, across sounds, etc. These approaches slow the progress in understanding how listeners with hearing difficulties use context to recognize speech and how their hearing aids and/or cochlear implants might be modified to improve their perception. This research has three main goals. First, the investigators predict that performance in speech sound recognition experiments will be related when testing the same speech frequencies or the same moments in time, but that performance will not be related in further comparisons across speech frequencies or at different moments in time. Second, the investigators predict that adding background noise will make this contextual speech perception more difficult, and that these difficulties will be more severe for listeners with hearing loss. Third, the investigators predict that cochlear implant users will also use surrounding sounds in their speech recognition, but with key differences than healthy-hearing listeners owing to the sound processing done by their implants. In tandem with these goals, the investigators will use computer models to simulate how neurons respond to speech sounds individually and when surrounded by other sounds.

A vizsgálat csoportja

• Speech perception experimentsA vizsgált kezelés

  This arm involves experiments wherein participants listen to speech played at comfortable volumes and respond by indicating what they heard either in open-ended form or by choosing among a set of options displayed on a computer.

  Kezelés: Speech Manipulation