Perceptual Spaces Induced by Cochlear Implant All-Polar Stimulation Mode.
Jeremy Marozeau, Colette M McKay
PMID 27604784WHAT IT FOUND
Cochlear implant users judged sounds from a new stimulation mode as slightly different in quality, but no clearer than standard sounds.
This mode did not help listeners tell two stimulation sites apart, so it may not improve hearing in noise.
Key findings
01A new stimulation mode created a perceptual difference that listeners could detect, but it did not make two simultaneous stimulation sites easier to distinguish.
02The new mode did not produce a systematic advantage in resolving spectral information, which is required for understanding speech like vowels.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The study included only five participants, which limits the generalizability of the findings. The specific perceptual quality that distinguished the new mode from the standard mode was not identified. The study tested artificial two-electrode stimuli, not the complex multi-channel signals used in everyday hearing.
Declared interests
The experiments used an experimental stimulator provided by Cochlear Ltd.
The easy way to misread this
Do not assume the new stimulation mode improves speech understanding. While it created a distinct sound quality, it failed to help listeners separate two stimulation sites better than the standard mode.