Sound testing: how to?

The tone changes at higher revs and because it's not il4 I don't think it gets as loud as them on full, I've been told it's not as loud going along?

[Mr Speirs]

Originally Posted by SUPERSTARDJ01

My akras in my tuono are 105dbs on tick over.

There's no way your bike would be 105db at tickover on an A weighted decibelometer. If it was unweighted then yes but then nobody measures noise unweighted.

It's more or less probably as you say not 100% accurate but to give you an idea we started it up my wife was about 3 feet in front of me talking to me and I could hear a word just saw her lips moving, trust me this beast is bloody loud.

[Mr Speirs]

Oh I dont doubt its loud mate and I don't doubt you have seen 105db on a decibelmeter but I am saying its not been measured correctly.

When you A-weight a decibel meter is ignores frequencies below 1kHz, which is why when you measure V-Twins they come up quieter as their exhaust notes fall below this threshold.

I've realised this noise testing is a bit of a nonsense To have my bike measured from 97 to 104 in a week shows that wind, what the bike is parked on and surrounding objects all make a difference.

and going on that, if I blip my throttle the noise is about 120dB so whats the point? Its as quiet as a lamb at 5500 steady revs (104 dB but blip it and its ear splitting. and who rides a bike at 5500 stead revs on a track?

Yorkie Chris's is off the scale

C