Evaluation of the Nucleus Spectra 22 Processor and New Speech Processing Strategy (SPEAK) in Postlinguistically Deafened Adults

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Abstract
A new speech processing strategy (SPEAK) has been compared with the previous Multipeak (MPEAK) strategy in a study with 24 postlinguistically deafened adults. The results show that performance with the SPEAK coding strategy was significantly better for 58.3% of subjects on closed-set consonant identification, for 33.3%) of subjects on closed-set vowel identification and open-set monosyllabic word recognition, and for 81.8%) of subjects on open-set sentence recognition in quiet and in competing noise (+ 10dB signal-to-noise ratio). By far the largest improvement observed was for sentence recognition in noise, with the mean score across subjects for the SPEAK strategy twice that obtained with MPEAK.