Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Academic Journal of Second Military Medical University》 1984-03
Add to Favorite Get Latest Update


Gao Wenyuan, et alDepartment of Prophylaxis in Naval Medicine  
Earplugs have effects on preventing noise. Many earplugs developed, when being used, may hinder speech communication because of their lack in frequency selectivity of attenuation.A new type earplug called a high-low frequency(HLF)earplug has been desingned. There is a Zigzag channel in the earplug, which lets speaking tones pass and absorbes high frequency noise. So it doesn't influence communication. And it could attenuate noise if channel be closed as well in an environemt with low frequency.According to Iso4869-1981 standard. HLF earplug's average attenuation is 29.1 dB. When the channel is opened its attenuation will be below 10 dB at low frequency; about 30 dB at high frequen-cy.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Chinese Journal Full-text Database 10 Hits
1 Yang Zhihuan,Wang Zhengguo, Tang Chengon, Liu(Research Institute of Surgery, Third Military Medical College, Chongqing 630042)Yao Desheng, Liu Zhengbang, Chen Tian(Artillery Equipment Technical Institute, Headquarters of the General staff);CRITICAL ESTIMATION OF THE INTERNAL ORGAN INJURY IN HUMAN BEING SUBJECTED TO WEAK BLAST WAVES[J];Explosion and Shock Waves;1992-01
2 Gao Wenyuan, et al(Department of Navy Medicine);INVESTIGATION ON MEASURING CHINESE SPEECH INTELLIGIBILITY OF EAR PLUGS[J];Academic Journal of Second Military Medical University;1987-03
3 Ming Cheng Yang Jianpin Guo QinghuaDepartment of ENT,Affiliated Hospital of Dali Medical College,Dali 671000);Audiological Analysis of 84 Cases of Deafness Caused by Explosion and Vibration[J];JOURNAL OF DALI MEDICAL COLLEGE;2000-03
4 QIU Jian-Hua,WANG Jin-Ling and LIU Shun-Li Department of Otorhinolaryngology,Xijing Hospital;Efiects of blast wave on SP-IR in spiral ganglion cells[J];Journal of The Fourth Military Medical University;1993-02
5 Gao Xia, Liu Shunli, Wang Jinling, Huang Weiguo, Qiu JianhuaDepartment of Otorhinolaryngology, Xijing Hospital, Fourth Military Medical University,Xi'an 710033;The influences of Mg2+-ATP on the calmodullin in hair cells of the explosive auditory organ[J];Journal of The Fourth Military Medical University;1997-01
6 Li Qi, Wang Liwen, Wang Boti, Yu Ali, Zhou Anwen and Li Suwei. Department of Otorhinolaryngology. First Affiliated Hospital, First Medical Military College, Guangzhou;PATHOLOGIC OBSERVATION ON BLAST ACOUSTIC TRAUMA IN GUINEA PIGS[J];Medical Journal of Chinese People's Liberation Army;1985-04
7 Zhai Suoqiang, Gu Rui. Li Xingqi, Wang Pei Ying, Sun Jianhe, Mei Shichang and Yu Liming. Director: Jiang Sichang. Laboratory of Ear Department. General Hospital of PLA. Beijing;EXPERIMENTAL OBSERVATION ON TEMPORARY THRESHOLD SHIFT IN HEARING AND HISTOCHEMISTRY IN THE COCHLEA IN GUINEA PIGS AFTER EXPLOSION[J];Medical Journal of Chinese People's Liberation Army;1985-05
8 Guo Wei, Hu Bohua, Wang Peiying.Institute of Otolaryngology, Chinese PLA General Hospital, Beijing 100853;OCCLUSION OF COCHLEAR MICROVESSELS BY PLUGGED LEUKOCYTES IN THE GUINEA PIG EXPOSED TO INTENSE NOISE[J];Medical Journal of Chinese People's Liberation Army;2000-06
9 Huang Delang;Influence of explosion on perilymph[J];Academic Journal of Plan Postgraduate Medical School;1986-01
10 Ning Zhuzhi et al (Third Military Medical College, PLA);EXPLOSIVE ACOUSTIC TRAUMA AT BATTLEGROUND AND ITS PHYSICAL PROTECTION[J];Journal of Preventive Medicine of Chinese People's Liberation Army;1990-01
【Secondary References】
Chinese Journal Full-text Database 3 Hits
1 HAN Yong-li1,CHEN Yang2,CHEN Long-zhu1(1.Institute of Engineering Safety & Disaster Prevention,Shanghai Jiaotong University,Shanghai 200240,China;2.Shanghai Real Estate Science Research Institute,Shanghai 200031,China);Simulation on Anti-blast Ability of Masonry Wall under Gas Explosion Load Based on LS-DYNA[J];Journal of Disaster Prevention and Mitigation Engineering;2010-03
2 HAN Yong-li1,CHEN Long-zhu2(1.ACO Architects and Consultants,Shanghai 200232,P.R.China;2.Institute of Engineering Safety & Disaster Prevention,Shanghai Jiaotong University,Shanghai 200240,P.R.China);Failure Analysis of Residential Buildings under the Gas Explosion Accident[J];Journal of Civil,Architectural & Environmental Engineering;2011-06
3 HAN Yong-li1,CHEN Long-zhu1,CHEN Yang2(1.Institute of Engineering Safety & Disaster Prevention,Shanghai Jiao Tong University,Shanghai 200240,China;2.Shanghai Real Estate Science Research Institute,Shanghai 200031,China);Numerical Analysis of Civil House Wall under Gas Explosion Load[J];Building Science;2010-09
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved