Using residual H1* for voice quality research

One of the most common ways of assessing voice quality is through the spectral slope measure H1*-H2*. However, Chai and Garellek [J. Acoust. Soc. Am. 152(3), 1856-1870 (2022)] propose and demonstrate the robustness of a new measure-residual H1*. In this study, we test the reliability of residual H1* in capturing voice quality contrasts in Santiago Laxopa Zapotec. We find that residual H1* is a more robust measure of voice quality than H1*-H2* and can capture the differences in voice quality in Santiago Laxopa Zapotec, which supports the use of this measure in voice quality research.