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Binaural enhancement for bilateral cochlear implant users.
1Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Ear and Hearing
|August 22, 2014
Summary
Enhancing binaural cues in bilateral cochlear implant (BCI) users by extending low-frequency interaural level differences improved speech intelligibility. This method offers greater auditory perception for BCI recipients in challenging listening environments.
Area of Science:
- Auditory Neuroscience
- Speech Processing
- Cochlear Implant Technology
Background:
- Bilateral cochlear implant (BCI) users have limited binaural cues, resulting in poor speech intelligibility improvement from spatial cues.
- Current BCI technology offers restricted interaural differences of levels (ILDs) primarily in high frequencies.
Purpose of the Study:
- To investigate the feasibility of enhancing binaural cues for BCI users.
- To extend ILDs into the low-frequency region to improve speech perception.
Main Methods:
- Speech intelligibility was assessed in BCI users under headphone and direct stimulation conditions.
- A target talker was presented on one side, with a masker talker on the opposite side.
- Spatial separation was achieved using naturally occurring or enhanced binaural cues.
Main Results:
- BCI users demonstrated significantly greater speech intelligibility with enhanced binaural cues compared to natural cues.
- The enhancement involved applying ILDs in the low-frequency range.
Conclusions:
- Enhancing binaural cues by extending ILDs into low frequencies can improve speech intelligibility for BCI users.
- This approach shows potential for improving auditory perception in specific listening scenarios for individuals with BCI.
