As well as their contribution to fuel consumption, tyres affect the environment because of the exterior noise they generate.
To reduce noise pollution from road transport, tyre manufacturers must comply with regulations setting increasingly stringent maximum limits for the noise that tyres generate external to the car.
The bottom part of the label shows exterior noise level, measured in decibels (dB). Bear in mind that a 3dB difference is equal to a doubling (or halving) of the noise output.
A single 'sound wave' shows that the tyre's noise level is 3dB better than the future European limit.
Two black 'sound waves' shows that the tyre meets the future European limit.
Three black 'sound waves' shows that the tyre only meets the current European limit for noise.
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Last edited by TOX1C; 23-07-13 at 12:55.