With Alpine Moto Safe earplugs you will never have a ring in your ears after a long drive. With 2 sets of filters for average (SNR17) & heavy muting (SNR20). With Alpine Moto Safe Pro earplugs you will never have a ring in your ears after a long drive. You prevent hearing damage & a tired feeling due to the noise of wind noise. At a speed of 120 kilometers per hour, the volume of wind noise under the helmet averages 98 d B. This means that you can sustain permanent hearing damage after 7 minutes. Moreover, you get tired earlier, which means that you participate in traffic less concentrated. Alpine Moto Safe Pro earplugs dampen the harmful sound without giving a closed feeling. Traffic, navigation, intercom & the engine itself remain sufficiently audible, thanks to the innovative Alpine Acoustic Filters. Speed Wind noise inside the helmet Max. time without risk of hearing damage 100 km/h 94 d B 15 min. 120 km/h 98 d B 7 min. 140 km/h 102 d B 3 min. 160 km/h 106 d B 90 sec. Alpine Moto Safe...