Archive for April 6th, 2011

Noise Testing at Track Days

After many years of judging acceptable sound levels “by ear”, we have been obliged to start sound testing (ie noise testing) at our Aintree Track Days this year. Starting with the May 2011 track day , all cars will have to pass a noise test and must not exceed 105dB(a) taken 0.5m from the exhaust […]