Measurements of sound exposure (n= 151) were recorded in children aged 6 to 18 years with Metrosonics dB 301 Metrologgers. For each child, a log equivalent sound level (Leq) and corresponding sound source were recorded for 480 separate 3‐min intervals during a 24‐h period. Data for each individual were summarized into 20 activity (sound source) categories, and anLeq(8) andLeq(t) computed for each, wheretis the total time spent engaged in a specific activity. Analysis of variance reveals highly significant differences inLeqs among activities, and Duncan's multiple range test suggests four groupings. Lawnmowers/combustion engines, live music, school bus, and school assembly/recess are major sound sources for children; each sound source has anLeq(t)>80 dB in boys and girls and average exposure duration of 0.5 to 2.1 h per day for those exposed. There is a significant sex difference in total sound exposure;Leq(24) = 77.8 ± 6.1 and 75.2 ± 5.3 in boys and girls, respectively. Boys appear to place themselves in a noisier environment than girls, since girls have a lower meanLeqthan boys for virtually every activity. [Work supported by EPA and USAF.]