From half helmets, open face, to full-face helmets and all have different volumes of noise generated depending on whether you're driving a cruiser, sports bike, chopper, windscreen, fairing, and the speed you're driving on the open road. A number of helmet manufacturers have a range of wind noise volumes specified in the dBA at different driving speeds. There is a large variation in wind noise in helmets, and it is the high frequency of wind noise that tends to drown out information that carries a high frequency of articulation that interferes with speech comprehension.
Ear cups are an attempt to reduce the amount of extraneous noise entering the ear whilst riding and thus make it easier to hear music and understand speech. The ear cups provide a peripheral acoustic seal around the outer surface of the ear, the sound deadening material the covered cushion is made from, serves to reduce the amount of high-frequency noise reaching the ear from outside, the hole in the centre where the ear speaker is placed. This is where the in-ear canal earphones have a distinct advantage over most other systems in that a close-fitting earplug will block a huge amount of extraneous noise and render the received sound clearer.
Riding a bike gives riders a sense of freedom on the open road. However, there are serious risks involved in riding without a helmet. A motorcycle does not provide the structural protection that a car offers to keep drivers safe in the event of an accident. Motorcyclists need to take extra precautions to protect their bodies. The most important place to start with is the protection of the head.
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