[Hearing loss in noisy workplaces].

Noise-induced hearing loss (NIHL) from prolonged occupational exposure to noise continues was described. Since a therapy against NIHL is not currently available, it is important to take actions to minimize the exposure to noise. It is also important to perform auditory controls. In October 1992, the Ministry of Labour issued "Guidelines for Preventing Noise Induced Disorders" in Japan. The guidelines oblige employers who hire over fifty workers to take actions to prevent NIHL at the workplace that have the equivalent noise level of 85 dB (A) or higher. In fact there are lots of noise-induced disorders at the small workplace. It should be obliged to use this guideline in all workplaces.