That's not a good statement. Just because a number is logarithmic does not make sound logarithmic...Here is a video that shows two different exhaust with similar dB output: https://www.youtube.com/watch?v=Ax6W-V9bsmg
> Two, you are comparing factory exhausts on the Harley meant to comply with noise regulations with top of the line aftermarket race exhausts for the Honda (which is probably as loud as you could make the Honda without removing the pipes entirely). They are not anywhere near each other - and the data in [1] really makes that point,
That's not a good statement. Just because a number is logarithmic does not make sound logarithmic...Here is a video that shows two different exhaust with similar dB output: https://www.youtube.com/watch?v=Ax6W-V9bsmg
As a side note, opening a can of coke will record 101.5 dB from one meter away: https://www.youtube.com/watch?v=uAd2BUB6XqQ
> Two, you are comparing factory exhausts on the Harley meant to comply with noise regulations with top of the line aftermarket race exhausts for the Honda (which is probably as loud as you could make the Honda without removing the pipes entirely). They are not anywhere near each other - and the data in [1] really makes that point,
Honda are subject 1 and 3, Harley are 5 and 6.
Subject 1 - 105 dB A, Subject 3 - 99 dB A.
Subject 5 - 101.8 dB A, Subject 6 - 106.7 dB A.
The two Hondas are not the same one you mentioned in your original post, However, stock exhaust is 72dB at idle and 86dB at half throttle on Honda CBR250R. http://www.motorcycle-usa.com/2013/03/article/2013-honda-crf...