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I included this in an earlier post. An extract from the Which? article on the new tyre labelling system:
"Noise has also been added, essentially treating this as another environmental concern.
Exterior noise levels are split into three categories and the figure is the noise level measured in decibel (dB). The curved bars coming out of the tyre show it in comparison with the new European tyre exterior maximum noise levels to be introduced until 2016 (72dB).
1 black sound wave = 3dB less than the future tighter European limit (very quiet).
2 black sound waves = already compliant with the future European limit (fairly quiet).
3 black sound waves = compliant with the current European limit but not with the new one (noisiest allowable).
While it will help drive noise levels down, we consider this less useful to owners, (and perhaps more relevant to their neighbours!), as it is based on a track side measurement of exterior tyre noise.
Most owners will never experience the noise from this perspective and are unlikely to be inclined to change their choice based on this rating. Our own noise assessments are of more use to buyers, as they consider measured exterior noise, and interior tyre noise, subjectively assessed by two testers in the car."
However the new system does not include a Wear rating. Which? offer the only independent test results for tyre wear in the UK, allowing subscribers to compare tyres on this important factor before buying.
Edited by Auristocrat on 17/04/2012 at 12:46
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