Conference Proceedings

The effects of mp3 compression on acoustic measurements of fundamental frequency and pitch range

R Fuchs, Olga Maxwell

Proceedings of the International Conference on Speech Prosody | ISCA | Published : 2016

Abstract

Recordings for acoustic research should ideally be made in a lossless format. However, in some cases pre-existing data may be available in a lossy format such as mp3, prompting the question in how far this compromises the accuracy of acoustic measurements. In order to determine whether this is the case, we compressed 10 recordings of read speech in different compression rates (16-320 kbps), and reconverted them to wav in order to examine the effect of compression on commonly used suprasegmental measures of fundamental frequency (f0), pitch range and level. Results suggest that at compression rates between 56 and 320 kbps, measures of f0and most measures of pitch range and level remain reliab..

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