So a key part of this is that they are measuring dBA SPL at 20 inches. A weighting significantly discounts the low frequency portion, and penalizes the high frequency part. https://en.m.wikipedia.org/wiki/A-weighting
If I was designing to meet this standard, I would choose dimensions giving a low frequency exhaust note (which IMHO sound better anyway). I'm OK with these kind of regulations, I just wish they were enforced. All I seem to see / hear are Harley's blaring away, and in addition to being annoying, I think this image does harm for the motorcycle community as a whole.
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If I was designing to meet this standard, I would choose dimensions giving a low frequency exhaust note (which IMHO sound better anyway). I'm OK with these kind of regulations, I just wish they were enforced. All I seem to see / hear are Harley's blaring away, and in addition to being annoying, I think this image does harm for the motorcycle community as a whole.
Sent from my iPhone using Tapatalk Pro