Related Experiment Videos
Predicted and measured speech recognition performance in noise with linear amplification.
L Magnusson1, M Karlsson, A Leijon
1Department of Audiology, Sahlgrenska University Hospital, Göteborg, Sweden.
Ear and Hearing
|March 29, 2001
Summary
The Speech Intelligibility Index (SII) accurately predicts speech recognition in hearing aid users. This method offers a more reliable way to compare hearing aid performance than traditional speech recognition tests.
Area of Science:
- Audiology
- Speech Science
- Hearing Aid Technology
Background:
- Hearing aid fitting aims to optimize speech intelligibility.
- Traditional speech recognition tests can be variable.
- The Speech Intelligibility Index (SII) is a model predicting speech understanding.
Purpose of the Study:
- To evaluate the Speech Intelligibility Index (SII) for hearing aid fitting.
- To determine if SII-based predictions are more reliable than measured speech recognition.
Main Methods:
- 29 elderly participants with mild-to-moderate hearing loss were tested.
- Speech recognition was measured using Phonemically Balanced (PB) words and a Just-Follow-Conversation (JFC) test.
- SII predictions were calculated using speech/noise spectra, pure-tone thresholds, and hearing aid gain.
Main Results:
- Calculated SII scores accurately predicted measured speech recognition scores.
- The intra-individual variability of predicted scores was minimal (approx. 1%).
- JFC test results aligned with word recognition for aided conditions.
Conclusions:
- The modified SII provides a valid estimation of speech recognition for hearing-impaired individuals.
- SII-based intelligibility estimation is more reliable for comparing hearing aid settings within subjects.