SII and fit-to-target analysis of compression system performance as a function of number of compression channels
| Autor: | Timothy D. Trine, William S. Woods, Martin E. Rickert, Dianne J. Van Tasell |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Hearing aid
Linguistics and Language medicine.medical_specialty Speech recognition medicine.medical_treatment Crossover Equalization (audio) Audiogram Function (mathematics) Audiology Compression (physics) Language and Linguistics Loudness Speech and Hearing medicine Mathematics Communication channel |
| Zdroj: | International Journal of Audiology. 45:630-644 |
| ISSN: | 1708-8186 1499-2027 |
| Popis: | This work was undertaken to answer the question, ‘How does the speech audibility/fit-to-gain-target provided by compression change with number of channels?’ For each of 957 audiograms and a given number of compression channels, the channel crossover frequencies were set either to maximize the SII (speech intelligibility index) for low- and high-level speech spectra, or to optimize the fit-to-gain targets from the Cambridge method for loudness equalization (CAMEQ). The audiograms comprised all common configurations, and losses ranged from mild to severe. Use of these computational procedures allowed the predicted, channel-number-based performance to be determined separately from the effects of other compression parameters. From one to five channels were sufficient to yield predicted speech recognition performance within 5% of maximum for 90% of the ‘mild’ and ‘moderate’ audiograms. Three to nine channels were necessary for the same level of predicted performance for 90% of the ‘severe’ audiograms. Four cha... |
| Databáze: | OpenAIRE |
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