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. 2022 Oct 26;43(3):197–222. doi: 10.1055/s-0042-1756164

Table 1. iPhone Health App Listening Level Classification of Sound Levels (dBA) and Maximum Exposure Time Limit.

Listening sound level (dBA) Maximum exposure time limit
Over 7 d Over 6 mo
75 127 h 3,048 h
80 40 h 960 h
90 4 h 96 h
100 24 min 9.6 h
110 2 min 48 min
120 14 s 5.6 min