Mpeak, speak and CIS Speech Coding Strategies for Cochlear Implants

The application of cohlear implant in the correction of hearing and speech impediments in deaf persons is known more than 16 years. This paper compares 3 different speech-coding strategies. These are the multipeak (MPEAK) coding strategy, the new spectral-peak (SPEAK) coding strategy and the high-rate continous interleaved sampling (CIS) coding strategy. Results of several investigations show that the SPEAK and CIS coding strategies, basedon spectral signal analysis, allow for better speech understanding in quiet as well as in noise, than MPEAK coding strategy, which relays on speech feature extraction.