Study of Communication under Noisy Environment.

为了有效和安全地工作，如何通过语音进行交流是很重要的。在这篇报告中，我们描述了四个主题。第一：关于次声。在嘈杂的地方，也存在次声。我们在其他地方已经报道过内耳作为次声的接收器起着重要的作用。声与次声联合刺激可影响听器或孔体状态。这种影响很容易受到个人能力的影响。第二：关于噪声性听力损失。我们发现当一个人从嘈杂的环境中获取信息时，可能会发展出更多的听力损失。第三：关于职业性嗓音障碍。我们调查了在嘈杂环境中交流的员工的嗓音障碍，我们测量了噪音强度，分析了声音，并检查了这些员工的声带。最后：关于助听器，我们一直在努力改进助听器，通过减少令人不快的背景噪音来获得舒适的交流。

For the efficient and safe working, it is important how one can communicate by speech. In this report, we describe about 4 topics.1st: about Infrasound.In the noisy places, there also exists infrasound. We have reported elsewhere that inner ear plays an important role an the recepter of infrasound. Combined stimmulation of sound and infrasound may effect hearing organ or hole body condition. This effect was easily influenced by individual susceptibility.2nd: about Noise Induced Hearing Loss.We found possibility of developing more hearing loss when one fried to pick up information from noisy environment.3rd: about Occupational Voice Disorders.We investigated voice disorders for the employee who had communicate under noisy conditions, We measured noise intensity, analysed the voice, and examined the vocal cord of those employee.Finally: about Hearing Aid.We have been trying to improve hearing aid to get comfortable communication by reducing unpleasant background noise.