Effect of low frequency noise on the echocardiographic parameter E/A ratio.
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.
School of Public Heath, Taipei Medical University, Taipei, Taiwan.
Pao-Chiang
PC
Chao
Ching-Ying
CY
Yeh
Yow-Jer
YJ
Juang
Ching-Yao
CY
Hu
Chiou-Jong
CJ
Chen
D000704:Analysis of Variance; D001301:Audiometry, Pure-Tone; D001359:Aviation; D016022:Case-Control Studies; D004452:Echocardiography; D006317:Hearing Loss, Noise-Induced / Q000453:epidemiology*; D006801:Humans; D008297:Male; D009623:Noise, Occupational / Q000009:adverse effects*; D016273:Occupational Exposure / Q000009:adverse effects*; D012307:Risk Factors; D013624:Taiwan / Q000453:epidemiology