Spectral Dynamics and Speech Understanding by Hearing Impaired People
Completed · Not applicable
Conditions studied: Hearing Loss, Sensorineural
In brief
The purpose of this program of research is to understand the perception of the dynamic spectral properties of speech by hearing-impaired listeners, with the long-term goal of improving speech understanding by these individuals in adverse listening conditions. The proposed research compares the performance of normally-hearing and hearing-impaired listeners on measures of speech understanding in the presence of different types of signal distortion and speech understanding of signals with enhanced spectral dynamics. A computational model based on the amount of potential information available in speech will be used to quantify differences in speech intelligibility due to hearing status and stimulus characteristics.
Key facts
- Study ID
- NCT01867515
- Run by
- VA Office of Research and Development
- People needed
- 50
- Starts
- 2013-08-01
- Expected to finish
- 2016-09-01
- Last updated by the study team
- 2018-04-26
Who can join
Age: 18 and older, up to 65. Sex: any. Healthy volunteers: accepted.
You may qualify if…
- individuals with hearing thresholds of 20 dB HL or better at all octave frequencies between 250 Hz and 4000 Hz
- or, individuals with bilateral sensorineural hearing losses with thresholds between 25 and 70 dB HL and no losses greater than 70 dB HL at frequencies of 4000 Hz or below
You may not qualify if…
- a conductive hearing impairment or other otological pathology
- hearing thresholds greater than 70 dB HL at any frequencies of 4000 Hz or below or pure-tone averages (averaged across 500, 1000, and 2000 Hz) of greater than 65 dB HL
- bilateral differences greater than 20 dB at any frequency below 4000 Hz
- an inability to complete the experimental tasks
Where it is running
- VA Portland Health Care System, Portland, OR — Portland, Oregon, United States
Full record on ClinicalTrials.gov
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