8. The matters referred to in this paragraph are likely to be appropriate
for the noise management plan. No racing car operating at the
venue shall generate noise levels greater than 95 dB(A) Leq at any
location around the track assessed at 25 metres. The assessment
may be carried out at any time when the noise influence from any
other racing will not significantly influence the measured value.
The period of measurement will be for any 4 6 second period
during which time the race car must pass the measurement location
at no more than 25 metres and with the engine under near
maximum load.
The race car, when being tested, must be operating at a circulating
speed within one second of the race cars best qualifying lap times.
Race cars, which the assessing officer determines have exhaust
noise containing excessive backfiring, will have 3 dB(A) Leq added
to the measured values before comparing the race car noise levels
with the criterion level.
The measurement location will provide an uninterrupted view to the
race car exhaust outlet when the exhaust outlet will be facing an
outside track measurement location.
During a racing event day within one hour of the commencement of
circuit events, the promoter will arrange 10 stationary noise checks
on randomly chosen race cars when the race cars remain in the pit
area. Where possible, the testing location should be screened
from view from any nearby houses. The screening material must
weigh at least 12 kg/m2 and must be twice the car length and 1.5
times higher than the highest part of the roll cage. A building may
be used to provide screening.
The purpose of the test will be to identify cars that may be required
to carry out formal testing on the circuit.
A type 1 grade sound level meter will be placed within 525mm of
any exhaust outlet.
The engine of the race car will be revved to three-quarters of
maximum engine power revs and held for a period of 2 5
seconds. The noise level recorded will be the dB(A) Leq for the
period.
The test will be repeated three times and the arithmetic average of
the recorded values reported. The noise level qualifying for a race
car to be considered for formal circuit testing will be determined by
correlation testing at a circuit but is expected to be in the order of
120 dB(A) Leq.
Owners of cars with stationary test noise levels greater than the
criterion level will be provided with three options:
1. Reduce the noise and re-test
2. Request a full circuit test
3. Not race at the event
Any race car owner requesting a full circuit test and failing the test
will be banned from the event .
During the racing events any race car identified during racing as
having significantly higher noise levels than the rest of the cars will
be considered for a stationary test at least and if failing the first
stationary test offered the same options described above.
Reply With Quote
Originally Posted by budda
)
Bookmarks