FIG. 8.
Perception of the vocal effort for gender, as function of ΔSPL, fo and std_ΔSPL. The families of lines correspond to the combinations of three fo and three std_ΔSPL. A low, medium and high value of fo was chosen for males (100 Hz, 150 Hz and 200 Hz) and females (200 Hz, 250 Hz and 300 Hz), as well as a low, medium and high value of std_ΔSPL (5 dB, 10 dB and 15dB).