Fig. 5.

Data collected from four singers in an acapella group simultaneously measure vocal energy dose, heart rate, and respiratory rate. (A) Real-time simultaneous data acquisition from four singers wearing MA devices. (B) Pictures of the user interface for devices for each of the singers. (C) Representative spectrograms from each singer: base (singer 1), countertenor (singers 2 and 3), soprano (Singer 4). Simultaneous measurements of (D) cumulative singing energy dose, cumulative singing time, (E) cumulative speaking energy dose, cumulative speaking time, (F) heart rate, and (G) respiratory rate for each singer.