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Effects of hearing loss on echo thresholds.
Richard A Roberts1, Joan Besing, Janet Koehnke
1University of South Florida, Department of Communication Sciences and Disorders, Tampa, Florida 33620, USA.
Ear and Hearing
|August 27, 2002
Summary
Individuals with hearing loss have higher echo thresholds, meaning they are less sensitive to echoes. This may contribute to difficulties in sound localization for those with impaired hearing.
Area of Science:
- Auditory Perception
- Psychoacoustics
- Audiology
Background:
- Echo perception is crucial for spatial hearing.
- Hearing loss can significantly alter auditory processing.
Purpose of the Study:
- To investigate the impact of hearing impairment on the ability to perceive echoes.
- To quantify differences in echo thresholds between normal-hearing and hearing-impaired listeners.
Main Methods:
- Echo thresholds were measured using pairs of noise bursts with varying delays.
- Listeners included groups with normal hearing and impaired hearing.
- Measurements were conducted across a range of sensation levels (dB SL).
Main Results:
- Listeners with impaired hearing demonstrated higher echo thresholds compared to normal-hearing listeners.
- Echo thresholds were significantly higher at lower sensation levels (10 dB SL) than at higher levels (40 dB SL) for both groups.
- Differences were observed in the psychometric functions between the two listener groups.
Conclusions:
- Hearing impairment is associated with reduced sensitivity to echoes.
- Elevated echo thresholds in individuals with hearing loss may explain challenges in sound localization in real-world environments.