论文部分内容阅读
过度暴露噪音可引起暂时性或永久性听阈改变。噪声对相应其中心频率之上半个8度育处的耳蜗部分影响最大。当摩托车速达40mph以上时，对乘坐者的噪声水平可达到85dB（A）。安全帽盔下涡流引起的低频率的风的噪声，可达90dB（A）左右。车速达100mph时，噪声水平可达110dB（A）左
Excessive exposure to noise can cause temporary or permanent hearing threshold changes. The noise had the greatest effect on the cochlear portion of the upper half of the 8-degree center corresponding to its center frequency. When the motorcycle speed of 40mph above, the noise level of the occupants up to 85dB (A). Low-frequency wind noise caused by eddy current helmets can reach 90dB (A) or so. When the speed reaches 100mph, the noise level can reach 110dB (A) left