Ohgami Nobutaka, Oshino Reina, Ninomiya Hiromasa, Li Xiang, Kato Masashi
Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine.
Nihon Eiseigaku Zasshi. 2017;72(1):38-42. doi: 10.1265/jjh.72.38.
The inner ears contain the organ of Corti, vestibule and semicircular canal. The organ of Corti is crucial for hearing, while the vestibule and semicircular canal play important roles in maintaining balance. Exposure to noise at excessive levels is known to cause damages of the inner ears, resulting in noise-induced hearing loss. On the other hand, noise levels (dB) are used for the evaluation of health risks by exposure to noise, although noise consists of sound with broad frequencies (Hz). Thus, information about the frequency-dependent effect of noise on health is largely unknown. In this review, we first introduce noise-induced hearing loss caused by exposure to audible noise. We then describe the imbalance in mice exposed to low-frequency noise (100 Hz).
内耳包含柯蒂氏器、前庭和半规管。柯蒂氏器对听力至关重要，而前庭和半规管在维持平衡方面发挥着重要作用。已知暴露于过高水平的噪声会导致内耳损伤，从而引起噪声性听力损失。另一方面，尽管噪声由频率范围很广（赫兹）的声音组成，但噪声水平（分贝）被用于评估噪声暴露对健康的风险。因此，关于噪声对健康的频率依赖性影响的信息在很大程度上尚不清楚。在本综述中，我们首先介绍因暴露于可听噪声而导致的噪声性听力损失。然后，我们描述暴露于低频噪声（100赫兹）的小鼠体内的失衡情况。
