6Yeh-Liang Hsu,Chung-Cheng Huang,Chin-Yu Yo.Comfort evaluation of hearing protection[J].International Journal of Industrial Ergonomics,2004,33:543-551
7George Rachiotis,Charalambos Alexopoulos,Spiros Drivas.Occupational exposure to noise,and hearing function among electro production workers[J].Auris Nasus Larynx,2006,33:381-385
8余启元.个人防护装备知识与标准实用全书[M].武汉:湖北科学技术出版社,2002:106-112
9Domenico Pessina,Matteo Guerretti.Effectiveness of hearing protection devices in the hazard reduction of noise from used tractors[J].Journal Agricultural Engineering Research,2000,75(1):73-80
