- The ambient noise level in an urban business center is roughly 50 dBA. It is thought that any exposure to sound levels above 115 dBA is hazardous and should be avoided. The average angle grinder when running produces 90-103 dBA. Utilize that grinder and sound levels jump dangerously high. Accumulative effects of multiple sound levels, affect hearing differently. It is critical to ascertain exposure levels to sound, in order to reduce exposure and prevent hearing loss.
