Measuring exhaust noise level

Anyone know the correct procedure for measuring a bike's noise level? For example;

db meter settings flat or A weighted.
Distance and position of mic in relation to exhaust opening.
Engine rpm, is it a peak level or an average across the rpm range?

 

I just pop up to nearest track running a track day and get them to noise to test it

 

1m@90deg 5500rpm for a thou

 

Does this level sound quiet , or normal or sporty ?

 

That's quiet.

UK Tracks are the most stringent of most places.
On the road noise in general aint an issue unless it's stupid loud or you get pulled for sumat else and they then feel like 'fine tooth combing' U!

 

Thanks for that Scooby, that makes sense.

 

not sure what you mean? this is just how they test noise levels at tracks

 

Funnily enough I'm off to Oulton 2morrrow just for a Noise test prior to a Trackday on the 23rd.

Had some mods done to the Bike including a De-Cat link pipe so just want to check it passes before the 23rd, otherwise it'll be an expensive day!

 

Be interested to see how you get on
Is it a trackday tomorrow ?

 

i'm there jay

 

At Castle Combe you need to be under their noise limit (105db) at 3/4 RPM. (about 10k RPM on a blade)
This rules out stock '08 and '10-on Fireblade and a few list of others.

I'm not sure which exhausts can get the blade under these limits.

 

My freshly De-Catted link pipe and Akra can failed at 104db!

Custom Akra DB Killer on way!