Please use the NEW web page for audio demos

 

Please go to download center to get the latest cochlear implant simulation program that allows you to listen to all kinds of audio sounds via cochlear implants and hearing loss.

 

This demonstration simulates what speech and music would sound like through a cochlear implant. While the quality of the sound is not necessarily the same as what a person hears with a cochlear implant, laboratory tests have demonstrated that the intelligibility of speech with this simulation is very similar to that of a cochlear implant. Want to listen to your own voice after all kinds of simulation (hearing loss, single-channel CI, multi-channel CI, CIS or m-n strategy, and many more), please go to download center to get the latest cochlear implant simulation program (free).

 

The simulations are generated by dividing the speech frequency spectrum into several spectral bands by band-pass filters. The envelope is extracted from each band by half-wave rectification and low-pass filtering at 160 Hz. This envelope signal is used to modulate a wide-band white noise, which is then filtered with a band-pass filter, usually the same filter used in the analysis. The modulated noise bands are then summed and written to the enclosed demo file. Brief descriptions of the files are as follows.

 

 

1. Effect of Number of Spectral Channels on Speech Recognition in Quiet:

These files demonstrate the effect of changing the spectral resolution on speech recognition in quiet. The speech demo file contain a single sentence that has been processed with a sinewave processor with 1, 2, 4, 8, and 16 bands, as well as the original unprocessed sentence. The following audio files are .mp3 files. Please click the image to listen to the sound.


2. Effects of Number of Spectral Channels on Speech Recognition in Noise (SNR=0dB):

These files demonstrate the effect of changing the spectral resolution on speech recognition in noise. The speech demo file contains a single sentence that has been processed with a sinewave processor with 1, 2, 4, 8, and 16 bands, as well as the original unprocessed sentence. The following audio files are .mp3 files. Please click the image to listen to the sound.


 

3. Effects of Number of Spectral Channels on Music Appreciation

These files demonstrate the effect of changing the spectral resolution on speech recognition in noise. The speech demo file contain a single sentence that has been processed with a sinewave processor with 4, 8, 16 bands, and 32 bands as well as the original unprocessed sentence. The following audio files are .mp3 files. Please click the image to listen to the sound.