I think they check.
CO Grant Emery and local deputies teamed up for snowmobile sound test patrol.
Numerous tests were done to determine sound levels on snowmobiles. Three subjects
were ticketed for having exhaust emissions over the legal limit. COs Grant Emery, Jason Wicklund, Brian Bacon and Sgt. Marc Pomroy conducted a
joint snowmobile patrol with the US Forest Service. Sound testing was conducted, as
well as registration and speed related checks. No sound meter violations were
encountered, but six tickets were written for registration and trail permit violations. COs conducted two snowmobile patrols in Alger County targeting alcohol and excessive
sound violations. Several sleds were tested for excessive sound and many warnings
were given. One subject was ticketed due to the high decibel reading. The testing
received many positive comments from the snowmobilers.