What Makes the Cepstral Peak Prominence Different to Other Acoustic Correlates of Vocal Quality?

What Makes the Cepstral Peak Prominence Different to Other Acoustic Correlates of Vocal Quality?: Cepstral peak prominence (CPP) has become the most successful individual acoustic measure for the objective measurement of vocal quality. It is also the strongest contributor to multidimensional available measures like Acoustic Voice Quality Index1 and Cepstral and Spectral Index of Dysphonia.2 However, a clear understanding of what CPP actually measures and where it can (and where it cannot) be expected to outperform other measures are issues which are still not clearly understood. Given the popularity and relevance that CPP has attained, these topics are of major interest, as the latest literature reveals.