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Effect of single-channel compression on temporal speech information
1Speech and Hearing Sciences Department, University of Washington, Seattle, USA.
Journal of Speech and Hearing Research
|October 1, 1996
Summary
Single-channel syllabic compression in hearing aids did not affect speech recognition scores for normal-hearing or hearing-impaired listeners. This suggests compression does not hinder temporal cue use when audibility is maintained.
Area of Science:
- Audiology
- Speech Processing
- Hearing Aid Technology
Background:
- Syllabic compression is common in hearing aids, but its benefits are debated.
- Understanding its impact on speech perception, especially temporal cues, is crucial.
Purpose of the Study:
- To evaluate the effect of single-channel amplitude compression on speech recognition.
- To specifically assess the impact on the use of temporal information in speech signals.
Main Methods:
- Speech recognition was tested using natural speech (FullSpeech) and modulated noise (SCN) stimuli.
- Stimuli were presented in both original and digitally compressed forms (syllabic compression).
- Participants included individuals with hearing loss and a normal-hearing control group, with audibility ensured.
Main Results:
- No significant difference in recognition scores was found for compressed versus uncompressed stimuli in either group.
- Compression did not negatively impact the ability to use temporal information in speech signals.
Conclusions:
- Single-channel syllabic compression, as tested, does not impair speech recognition for VCV syllables.
- The processing does not sufficiently alter temporal or spectral cues to reduce intelligibility when audibility is maintained.