The investigation may be conducted in the form of written questionnaire, hearing, on-the-spot investigation, entrusted investigation, etc.
调查可以采取书面问卷、召开听证会、实地调查、委托调查等方式进行。
Base on that, the noises which do human hearing harm, such as environmental noise, traffic noise, etc, are measured and analyzed.
在此基础上测量和分析了社会噪声、交通噪声等对人类听觉损伤较大的噪声。
Hearing AIDS, pacemakers, cameras, calculators, watches, etc.
助听器，心脏起搏器，照相机，计算器，手表等。
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