The noise levels of many off-the-road vehicles (ORVs) are potentially capable of causing damage to the human auditory mechanism. Most drivers of these machines refuse to wear ear protection because they contend that their helmets provide adequate attenuation. This study was designed to evaluate the attenuation of two typical recreational helmets. The results of this investigation indicated that recreational headgear alone is not sufficient protection from high noise levels. Drivers of ORVs should wear some form of ear protection in conjunction with their headgear until the noise levels of these machines are reduced.
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