ACSA: Sound Off on Snowmobiling EAST LANSING, MI / ACCESSWIRE / March 4, 2021 / While there may have been a time when a throaty engine rev was synonymous with snowmobiling, those days are long gone and a souped-up exhaust system can cause lost access as well as be illegal, reminds the American Council of Snowmobile Associations (ACSA). Snowmobiles have come a long way since the late 1960s when exhaust sounds would often reach above 100 decibels. Current snowmobiles have a regulated level of 73 decibels, which is slightly louder than a normal conversation, according to ACSA. "When a snowmobile's exhaust system is modified to increase the revving noise, it can be very annoying to homeowners and businesses located near snowmobile trails, other winter recreationists, as well as other snowmobilers," said Scott Herzog, president of ACSA.