Abstract
This paper provides an analysis of the effect of quantization and measurement errors on two algorithms for measuring short-time perturbation about a slowly varying or periodically varying mean. While these algorithms can be applied in a variety of applications, they will be discussed in the context of their use in quantification of vowel perturbations associated with hoarseness. The algorithms are referred to as the relative average perturbation and the directional perturbation quotient in speech analysis literature. The analyses indicate that significant errors are present in published studies. Sampling conditions and analysis techniques to minimize these errors are described.
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