OBJECTIVES: This study aims to validate vocoders as acoustic models of cochlear implants by determining whether they capture both perceptual sound quality and speech performance. We hypothesize that valid acoustic models of cochlear implants require listener-specific amounts of frequency mismatch between input filters and output tones or noise bands.
✦ The floor
Discussion
Signed responses from readers of the wire.
Researchers using frequency-matched acoustic vocoders as cochlear implant models should interpret results cautiously, particularly for perceptual sound quality outcomes, as this validation study questions their accuracy.
Vocoders are widely used as acoustic models of cochlear implant hearing in research; if they lack validity for sound quality — not just speech — this could affect the generalizability of a large body of CI research.
- 01Validation study tests whether frequency-matched vocoders accurately simulate cochlear implant (CI) perception.
- 02Assessment covers both speech recognition performance and perceptual sound quality — not just speech scores.
- 03Results suggest frequency-matched vocoders may be inadequate models for some perceptual dimensions.
- 04Findings challenge a standard assumption in CI research methodology.
- 05Has implications for how researchers design and interpret studies using acoustic CI simulations.
Frequency-matched vocoders accurately model cochlear implant speech performance.
studypartially supportedFrequency-matched vocoders accurately model cochlear implant perceptual sound quality.
studyunsupported- PMID
- 42747381
- DOI
- 10.1097/AUD.0000000000001892.
- Journal
- Ear and Hearing
- Publication type
- research_article
- Evidence level
- 2b
- Population
- Cochlear implant users and normal-hearing listeners using acoustic vocoder simulations
- Intervention
- Frequency-matched acoustic vocoder simulation of cochlear implant processing
- Comparator
- Direct cochlear implant user perception
Primary outcomes
Speech recognition performance; Perceptual sound quality