Well, if we were talking about road racing, I could tell you that we
take the measurement fifty feet from the edge of the racing surface,
with a limit of 103 dBa, whis is pretty loud, actually.
For reference, I can say that the lowest ambient sound reading I've seen
between track sessions is about 50 dBa. More often, ambient noise
levels hover around 60. During a track session, FV's and SRF's are
usually around 94 (+/- 5), and a typical SSB car (street legal?) is
around 80-85 dBa wide open. Oddly, many of the GT-1 and GTO class
ground pounders are quieter than some of the ITA Miatas out there.
I believe ClubRally has started a program of measuring cars at a certain
distance, 45 degrees from the rear corner of the car, while the engine
is being run at 2500(?) rpm. They have apparently given up on trying to
measure cars out on stages. This type of system might be good for Solo
II, also, although it seems more intuitive to simply put the meter on
the edge of the property nearest the most likely complainer. ;^)
I believe I saw something in the latest FasTrack that SCCA National is
starting to think about this issue for Solo II, and may have appointed a
committee.
A meter like the ones used at most SEDiv club races will cost over
$1500, and will require annual calibration at a cost of between $150 and
$350. I think there are some other models available at a lower price
that meet the basic accuracy requirements, though.
Of course, none of this addresses tire squeal, F500's, or rotary
engines, which some folks will point to as sources of irritation, no
matter how loud. If you don't like a sound, you classify it as
unwelcome noise.
Chuck Schultz
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On Tue, 9 Mar 2004 5:37pm, Carson or Wendy wrote:
> Looks like we are making progress but I have been given the heads up
> about the issue of noise.
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Chuck Schultz mailto:n2pua4@peoplepc.com
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