Drive by Noise Limits - News

As noise limits are becoming evermore strictly enforced, we are now displaying the drive by noise limit on the calendar for car and bike track days.

On almost all track days, a static noise test will performed on your vehicle prior to you being allowed to take in on track. What some people are not aware of is that most Circuits will also measure the sound at various parts of the circuit. This is called the 'drive by' limit and is usually measured at a distance of around 20 metres. If you have a vehicle that's increasingly noisy during gear change or at a certain rev count then you could run the risk of pipping the drive by limit. The drive by limit is nearly always lower than the static limit and often by 5 - 6 dB(A) or more.

Take a look at the calendar and you will now see the drive by limit shown clearly next to the static limit. Where there is no drive by limit displayed, this generally means its either the same as the static or not measured at all.