Figure 1. Continuous noise levels for machine workshops at different sampling sites. UAL, upper action limit; LAL, lower action limit [29]

From

Noise-induced Hearing Loss in Workshops and Laboratories in Kenyan Universities

Daniel Omondi Onyango, Robert Kinyua, Abel Nyakundi Mayaka, Christopher Kanali

Journal of Environment Pollution and Human Health. 2020, 8(2), 79-87 doi:10.12691/jephh-8-2-5