BTW, I got a complete 1300cc Hayabusa motorcycle exhaust system including
Tri-Y header, intermediate pipes and mufflers to study.
It is suposed to meet the 80 dB motorcycle noise limit, but that 80 dB is
hard to compare to ANYTHING else because the standard says it is measured
in NEUTRAL with the motor at barely cracked open throttle holding the motor
to a specified low RPM.
The mikes are supposed to be aimed 45 degrees to the axis of the bike (aimed
from front towards the back on the side) and located very very close to the
bike.
Chuck
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