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Validation of Cepstral Peak Prominence Smoothed (CPPS) and Acoustic Voice Quality Index (AVQI) for the Acoustic Analysis of Substitution Voices After Open Partial Horizontal Laryngectomy.

BACKGROUND: The acoustic analysis of substitution voices presents significant challenges. Traditional acoustic indices often fail to provide reliable assessments due to the intrinsic irregular nature of these signals. The present study aims to evaluate the validity of various acoustic parameters, including Cepstral Peak Prominence Smoothed (CPPs) and the Acoustic Voice Quality Index (AVQI), alongside traditional measures such as Jitter (Jitt%), Shimmer (Shimm%), and Harmonic to Noise Ratio (HNR) for assessing the quality of substitution voices after open partial horizontal laryngectomy (OPHL).