Deactivating too few channels fails to show performance differences in n-of-m CI strategies
Evidence
In general, it seems that SCE produces a detrimental effect in spectral modulation detection and vowel identification in CI users. These results are contrary to the model predictions. Previous studies in the literature give reasons to believe that spectral contrast enhancement would result in a benefit for the chosen tasks. It is possible that spectral valleys are attenuated too much and relevant information required by the CI users to understand speech is lost. These effects are not taken into account by the MPI model, and this could explain the contradictory results between experiments and CI users and modelling results. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1823 (
#expands, via linked claim)
Categorization
- XREF: connects to: Few channels being classified as indiscriminable limits the scope of deactivation studies; Too few channels were deactivated to demonstrate any speech benefit; Over-attenuating spectral valleys may remove speech information CI users need — Dijk, Pim van, Physiology, Psychoacoustics and…, 1823
Related
- Over-attenuating spectral valleys may remove speech information CI users need (similarity 0.92)
- Spectral valley over-attenuation may explain why contrast enhancement harms CI users (similarity 0.87)
- Too few channels were deactivated to demonstrate any speech benefit (similarity 0.86)
- Increasing spectral contrast enhancement worsens vowel identification in CI users (similarity 0.85)
- Deactivating pitch-indiscriminable cochlear implant electrodes yields no speech benefit (similarity 0.82)
- Deactivating discriminable electrodes controls whether benefit comes from channel count or pitch quality (similarity 0.82)
- Increasing spectral contrast enhancement worsens cochlear implant performance. (similarity 0.81)
- Spectral modulation threshold declines track vowel identification declines (similarity 0.81)
- Spectral contrast degradation in CIs impairs formant detection for speech (similarity 0.80)
- Spectral contrast coding can be enhanced by attenuating valleys while leaving peaks fixed (similarity 0.80)
- Pitch-based electrode deactivation provides no speech benefit for ACE users (similarity 0.79)
- Deactivating indiscriminable implant electrodes fails to improve and even worsens perception (similarity 0.78)
Broader Connections
- Over-attenuating spectral valleys may remove speech information CI users need
#expands(0.72) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1823