What is the reliable way to measure motorcycle exhaust sound to make the test agreeable both by the motorcycle industry and law enforcement? Ed Moreland, AMA vice president states that the MIC (Motorcycle Industry Council) and the SAE (Society Of Automotive Engineers) were able to establish for the first time a very simple decibels test. States and municipalities need now to be convinced, adopt and use it.
The standard test is touted as simple, consistent, and economical. But sound meters are required to perform the test and that’s the sticking point. Most cities refuse to hand sound meters to police officers because considered too expensive. Cities like Denver, Boston, Fairfax County VA already took a short cut by considering that exhaust not stamped with the EPA letters are illegal, hence too loud. New-York is contemplating using the same strategy.
Nevertheless, enforcement of the ordinance has been restrained because EPA stamps are generally found in out-of-the-way places such as on the underside of the exhaust system. Police officers are reluctant to get down on hands and knees with a flashlight at night to try to find the stamp…To make the noise issue more complex, the EPA exhaust standard certification is only valid for one year or 3,750 miles! How EPA did decide this?
The J2825 “Measurement of Exhaust Sound Pressure Levels of Stationary On-Highway Motorcycles,” issued by the SAE in May, establishes instrumentation, test site, test conditions, procedures, measurements and sound level limits. The J2825 standard is based on a comprehensive study of a wide variety of on-highway motorcycles. The question is will government use it? And if yes will the municipalities check the excessive noise from some cars, trucks, generators, leaf blowers, music boom boxes, etc…