香港六合彩开奖 1999:2013
2013-10
香港六合彩开奖 1999:2013
孝械蟹懈褋
香港六合彩开奖 1999:2013 specifies a method for calculating the expected noise-induced permanent threshold shift in the hearing threshold levels of adult populations due to various levels and durations of noise exposure; it provides the basis for calculating hearing disability according to various formulae when the hearing threshold levels at commonly measured audiometric frequencies, or combinations of such frequencies, exceed a certain value.
The measure of exposure to noise for a population at risk is the noise exposure level normalized to a nominal 8 h working day, LEX,8h, for a given number of years of exposure. 香港六合彩开奖 1999:2013 applies to noise at frequencies less than approximately 10 kHz which is steady, intermittent, fluctuating, irregular. Use of 香港六合彩开奖 1999:2013 for sound pressures exceeding 200 Pa (140 dB relative to 20 碌Pa) is recognized as extrapolation.
袨斜褖邪褟 懈薪褎芯褉屑邪褑懈褟
-
孝械泻褍褖懈泄 褋褌邪褌褍褋: 袨锌褍斜谢懈泻芯胁邪薪芯袛邪褌邪 锌褍斜谢懈泻邪褑懈懈: 2013-10协褌邪锌: 袦械卸写褍薪邪褉芯写薪褘泄 褋褌邪薪写邪褉褌 锌芯写谢械卸懈褌 锌械褉械褋屑芯褌褉褍 [90.92]
-
袙械褉褋懈褟: 3
-
孝械褏薪懈褔械褋泻懈泄 泻芯屑懈褌械褌 :香港六合彩开奖/TC 43ICS :13.140
- RSS&苍产蝉辫;芯斜薪芯胁谢械薪懈褟
袧芯胁邪褟 胁械褉褋懈褟 胁 锌褉芯褑械褋褋械 褉邪蟹褉邪斜芯褌泻懈
香港六合彩开奖/DIS 1999
香港六合彩开奖/DIS 1999
Acoustics 鈥� Estimation of noise-induced hearing loss
香港六合彩开奖/DIS 1999
袞懈蟹薪械薪薪褘泄 褑懈泻谢
-
袪邪薪械械
袨褌芯蟹胁邪薪芯香港六合彩开奖 1999:1990
-
小械泄褔邪褋
袨锌褍斜谢懈泻芯胁邪薪芯香港六合彩开奖 1999:2013
小褌邪薪写邪褉褌, 泻芯褌芯褉褘泄 锌械褉械褋屑邪褌褉懈胁邪械褌褋褟 泻邪卸写褘械 5 谢械褌
协褌邪锌: 90.92 (袘褍写械褌 锌械褉械褋屑芯褌褉械薪芯)-
00
袩褉械写胁邪褉懈褌械谢褜薪邪褟 褋褌邪写懈褟
-
10
小褌邪写懈褟, 褋胁褟蟹邪薪薪邪褟 褋 胁薪械褋械薪懈械屑 锌褉械写谢芯卸械薪懈褟
-
20
袩芯写谐芯褌芯胁懈褌械谢褜薪邪褟 褋褌邪写懈褟
-
30
小褌邪写懈褟, 褋胁褟蟹邪薪薪邪褟 褋 锌芯写谐芯褌芯胁泻芯泄 锌褉芯械泻褌邪 泻芯屑懈褌械褌邪
-
40
小褌邪写懈褟, 褋胁褟蟹邪薪薪邪褟 褋 褉邪褋褋屑芯褌褉械薪懈械屑 锌褉芯械泻褌邪 屑械卸写褍薪邪褉芯写薪芯谐芯 褋褌邪薪写邪褉褌邪
-
50
小褌邪写懈褟, 薪邪 泻芯褌芯褉芯泄 芯褋褍褖械褋褌胁谢褟械褌褋褟 锌褉懈薪褟褌懈械 褋褌邪薪写邪褉褌邪
-
60
小褌邪写懈褟, 薪邪 泻芯褌芯褉芯泄 芯褋褍褖械褋褌胁谢褟械褌褋褟 锌褍斜谢懈泻邪褑懈褟
-
90
小褌邪写懈褟 锌械褉械褋屑芯褌褉邪
-
95
小褌邪写懈褟, 薪邪 泻芯褌芯褉芯泄 芯褋褍褖械褋褌胁谢褟械褌褋褟 芯褌屑械薪邪 褋褌邪薪写邪褉褌邪
-
00
-
袘褍写械褌 蟹邪屑械薪械薪芯
袙 褋褌邪写懈懈 褉邪蟹褉邪斜芯褌泻懈香港六合彩开奖/DIS 1999
袩芯褟胁懈谢懈褋褜 胁芯锌褉芯褋褘?
袨蟹薪邪泻芯屑褜褌械褋褜 褋 FAQ
效邪褋褘 褉邪斜芯褌褘:
袩芯薪械写械谢褜薪懈泻 – 锌褟褌薪懈褑邪: 09:00-12:00, 14:00-17:00 (UTC+1)