This SAE Recommended Practice establishes the test procedure@ environment@ and instrumentation for determining the maximum sound level potential for motorcycles.
SAE J47-1975 history
2020SAE J47-2020 Maximum Sound Level Potential for Motorcycles
2011SAE J47-2011 Maximum Sound Level Potential for Motorcycles
2005SAE J47-2005 Maximum Sound Level Potential for Motorcycles
1998SAE J47-1998 Maximum Sound Level Potential for Motorcycles
1993SAE J47-1993 Maximum Sound Level Potential for Motorcycles
1986SAE J47-1986 MAXIMUM SOUND LEVEL POTENTIAL FOR MOTORCYCLES
1977SAE J47-1977 MAXIMUM SOUND LEVEL POTENTIAL FOR MOTORCYCLES
1975SAE J47-1975 Maximum Sound Level Potential for Motorcycles