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Year : 2012  |  Volume : 14  |  Issue : 59  |  Page : 155--158

Effect of low frequency noise on the echocardiographic parameter E/A ratio

1 School of Public Heath, Taipei Medical University, Taipei; Department of Environment and Occupational Safety and Hygiene, Graduate Institute of Environmental Management, Tajen University, Pingtung, Taiwan
2 School of Public Heath, Taipei Medical University, Taipei, Taiwan
3 Department of Occupational Safety and Health, Chung Hwa University of Medical Technology, Tainan, Taiwan
4 School of Public Heath, Taipei Medical University, Taipei; Council of Labor Affairs, Institute of Occupational Safety and Health, Tainan, Taiwan

Correspondence Address:
Chiou-Jong Chen
School of Public Health, Taipei Medical University, 250 Wu-Xin Street, Taipei - 110
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Source of Support: National Science Council of the Republic of China, Taipei Taiwan, Conflict of Interest: None

DOI: 10.4103/1463-1741.99881

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The hearing condition of the Taiwanese aerospace maintenance workers affected by the low frequency noise had not been reported. The purpose of this research is to clarify the maintenance workers' health effect when exposed to low frequency and/or general noises and to understand the relationship between the variations of the worker's echocardiographic E/A ratio and the low frequency noise. The low frequency noise monitoring and echocardiographic E/A ratio results obtained for 213 aerospace maintenance workers indicated that the workers' hearing loss was more serious at high frequency 4k and 6k when exposed to the low frequency noise and could be more than 40 dB. The abnormality of echocardiographic E/A ratio was also higher than that of control group.


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