Auditory Perception and Cognition Group :: Andrew J. Oxenham, PhD
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Sound Demos

 

Cochlear-implant simulations
A noise-excited vocoder simulates certain aspects of cochlear-implant processing, by reducing spectral information and discarding temporal fine-structure information. This has surprisingly little effect on speech intelligibility in quiet:

1. Unprocessed sentence

2. Processed with a 24-channel noise-excited vocoder

However, in more complex situations, where the speech has to be segregated from competing sounds, cochlear-implant processing has a highly detrimental effect on intelligibility.

3. Unprocessed sentence in background speech

4. Processed with a 24-channel vocoder

For more details see Qin and Oxenham (2003).

Auditory chimaeras

ASA sound examples

 

 
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