To lure race Alfas to autobahn, potential entrants are probably interested in the location of the sound meters.
How far away from the track will these be? (the source measuring 105dB at 100 ft can be a lot louder than if it is measured at 50 ft.). Here's a neat calculator to play with...
Engineering Page > Noise > Attenuation by distance for overall value
Quote:
Originally Posted by Wil Painter
Carm: Will Autobahn enforce its sound limits? Quoting from their website - we need the Bobby Rahal exemption.
"Autobahn CC Strictly Enforces Sound Limits.
Autobahn's sound limits are and always have been 105 db.
Sound levels are monitored every day at different times of the day.
There are several spots on the tracks that we monitor from.
We have a non-negotiable policy of adhering to 105 db.
If your car is over 105db you will have to muffle it, or not run it.
Thank You
Autobahn CC Management
Note: Does not apply to Bobby Rahal Historic Races"
Photo below from Mid Ohio 2007 Alfa race
Looking forward to the promised details 
Wil |
__________________
George Schweikle
Co-chairman 2011 AROC Convention: ALFAS IN THE BLUEGRASS, Lexington, KY
1976 Spider (Dedicated Autocrosser, "SPICA, No Carbs")
1991 Spider Veloce (Retirement cruiser)
Scuderia Non Originale