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Individual differences in speech intelligibility at a cocktail party: A modeling perspective
Mathieu Lavandier1, Christine R Mason2, Lucas S Baltzell2
1Univ. Lyon, ENTPE, Laboratoire de Tribologie et Dynamique des Systèmes UMR 5513, Rue Maurice Audin, F-69518 Vaulx-en-Velin Cedex, France.
The Journal of the Acoustical Society of America
|September 2, 2021
Summary
A revised binaural model accurately predicts speech reception thresholds (SRTs) in listeners with hearing loss based on audibility. For normal hearing, the model predicts optimal SRTs but not poorer performance, indicating other limiting factors.
Area of Science:
- Audiology
- Speech Perception
- Hearing Loss Research
Background:
- Individual differences in speech reception thresholds (SRTs) are significant in sensorineural hearing loss.
- Existing binaural models require revision to accommodate severe hearing impairments.
Purpose of the Study:
- To predict individual variations in SRTs for young listeners with sensorineural hearing loss.
- To adapt an existing binaural model for severe hearing losses and evaluate its predictive accuracy.
Main Methods:
- Revised a binaural model by incorporating audiogram data, target speech level at SRT, and a signal-to-noise ratio floor.
- Validated the model using previously published datasets with stationary, modulated, and speech maskers.
Main Results:
- The revised model effectively predicted SRT variations in hearing-impaired listeners, primarily driven by audibility differences.
- For normal-hearing listeners, the model predicted best SRTs but failed to account for poorer performance, suggesting non-audibility-related limitations.
Conclusions:
- Audibility is a key factor in predicting SRTs for individuals with sensorineural hearing loss.
- Factors beyond audibility, such as cognitive processing, may limit speech perception in normal-hearing listeners under challenging conditions.
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