Just been readin up on this to make sure i understood it....

approx 3db is double the noise level.

so @ normal track days its 98db so 95 would be half the noise level, 92 half again, 89 half again etc....

and the noise level drops about 1-2db over 20-30m so if you use dono as an example, i really cannot see how you can do it....

Also found that the average city drive by is 88-90db....

I am really confused to why bedford is so low, is it measured wearing tights over the mike or somert ?