LANSING, MI - Conservation officers with the Michigan Department of Natural Resources remind snowmobilers that state law does have decibel limits for snowmobiles. \r\nOfficers in the western Upper Peninsula have been working patrols targeting sound violations in response to numerous complaints from landowners and others who live near snowmobile trails.\r\nUnder Michigan law, the muffler on a snowmobile must be in good working order and when in constant operation noise emission cannot exceed the following levels:\r\n\r\n\r\n\r\n\tFor snowmobiles manufactured after July 1, 1977 and sold or offered for sale in Michigan, 78 decibels at 50 feet, as measured using the 2003 Society of Automotive Engineers standard J192.\r\n\tFor a stationary snowmobile manufactured after July 1, 1980 and sold or offered for sale in Michigan, 88 decibels at 13.1 feet, as measured using the 2004 Society of Automotive Engineers standard J2567.\r\n\r\n\r\nThe penalty for violating the sound levels for snowmobiles is a civil infraction, with fines up to $250.\r\nThis season, conservation officers on patrols in the western U.P. have issued tickets to numerous snowmobile operators whose sleds have well exceeded the 88-decibel limit, said the DNR's Sgt. Ryan Aho.\r\n\u201cAs a point of comparison, a train whistle at 500 feet is 90 decibels and sustained exposure at that level may result in hearing loss,\u201d Aho said. \u201cWe encourage snowmobile operators to properly maintain their machines, and also discourage them from modifications that make sleds louder.\u201d\r\nSnowmobiles that do not comply with Michigan law for noise emission also can hurt the state\u2019s trails program, said Ron Yesney, a recreation specialist with the DNR.\r\n\u201cHalf of our snowmobile trails are on private lands and are there at the sole discretion of the landowner, and many pass through communities and very near to homes,\u201d Yesney said. \u201cSnowmobiles that exceed the noise emission levels are often a reason why we lose trail permissions on private land. Riders who modify their machines to make them extra loud jeopardize the enjoyment of our nationally recognized trails for all riders.\u201d\r\nFor more information on snowmobiling in Michigan, including current laws and regulations, go to www.michigan.gov\/snowmobiling.