Citing concerns over possible hearing loss for officers and civilians alike, the Spokane (WA) Police Department is putting suppressors on all of its 181 patrol rifles, according to the Spokesman-Review .
The Occupational Safety and Health Administration says that exposure to sound greater than 140 decibels can create risk for irreparable hearing damage. The unsuppressed shot from an SPD patrol rifle can be about 152 decibels, Major Eric Olsen told the City Council.