“…As emotional arousal increases, vocal folds open and close more rapidly, and f 0 increases (measured in Hertz (Hz)). F 0 as a measure of emotional arousal has also been shown to be meaningful in a range of studies on couples (e.g., Baucom et al, 2011;Baucom, Dickenson et al, 2015;Baucom, Sheng et al, 2015;Fischer et al, 2015Fischer et al, , 2017Weusthoff et al, 2013). F 0 as a measure of emotional arousal has also been shown to be meaningful in a range of studies on couples (e.g., Baucom et al, 2011;Baucom, Dickenson et al, 2015;Baucom, Sheng et al, 2015;Fischer et al, 2015Fischer et al, , 2017Weusthoff et al, 2013).…”