theelanman wrote:Cars: Saloon & Sports Cars - 105dB(A) measured statically at 0.5metres and 45deg angle, at ¾ maximum rpm
this was on the stuff monty posted about oulton.......I presume everywhere else is the same......
not necessarily, depends on the local council who grant the licenses etc.
This is from the Bedford wedsite
"At Bedford Autodrome we have two noise tests. First your car will be subjected to a static test, in which the noise level is measured 50cm away from your exhaust pipe with the engine at 75% of maximum rpm. The reading must not exceed 101 dB(A).
Secondly, and more significantly, your car must comply with our drive-by noise limits. The noise emission from your car must not exceed 87 dB(A) measured 20 metres from your car, which shall be accelerating maximally at over 60 mph.
All standard volume production cars will pass this test with ease, so, for example, if you have a standard Audi, BMW, Porsche, Subaru or Mitsubishi you will have no problems at all. The drive-by level will probably be less than 80 dB(A).
Cars, which tend to fail the test include most bike-engined cars, eg Westfields, Radicals and Caterhams, plus cars fitted with particularly loud “high performance” exhausts, as sometimes fitted to, for example, Caterhams, Lotuses, TVRs and Subarus.
If you are at all concerned that your car may not pass, it is advisable to either come to Bedford Autodrome in advance for a free noise check, in which case send an e-mail to
Moira.eagles@bedford-autodrome.com or call 01234 332400 to arrange this, or try to get an independent test done locally to you. You could try
www.association-of-noise-consultants.co.uk to find a local noise consultant, but they are likely to charge you for this. Please treat any test done by a third-party as a guide to whether your car is likely to pass or fail and be very cautious if it is approaching the limit as the readings that are taken at Bedford Autodrome will be the deciding factor over whether your car is too loud.
It must be stressed that the drive-by limit at Bedford is not something that can be “cheated”. The noise monitor records continually and we also have other noise meters around the track, so please do not think you will necessarily be able to continue running if you can pass the initial check.
Any breach of any of these regulations may result in you being asked to leave the circuit without refund. E & OE."
At Goodwood i believe that the noise detectors are linked to the council offices - but that is hearsay