15th International Congress of Phonetic Sciences (ICPhS-15)
It is known that increased levels of speaking loudness (vocal effort) lead to an increase in mean fundamental frequency. Less is known about the effect of vocal effort on F0-range and on the amount of speaker variation with respect to the relation between vocal effort and F0. Based on a corpus of 100 German-speaking male subjects it was found that, firstly, increased vocal effort does in fact lead to an increase in mean F0 across all subjects, secondly, that F0-standard deviation increases for about 90 percent of all subjects, and thirdly, that there are substantial speaker differences with respect to the size of the F0 differences in normal vs. loud speech. Some speaker differences occur also when amplitude measurements are included in the evaluation, i.e. for the same increase in signal amplitude some speakers show more substantial differences in F0-mean and F0-standard deviation than others.
Bibliographic reference. Jessen, Michael / Köster, Olaf / Gfroerer, Stefan (2003): "Effect of increased vocal effort on average and range of fundamental frequency in a sample of 100 German-speaking male subjects", In ICPhS-15, 1623-1626.