香港六合彩开奖 11904-2:2021
2021-03
香港六合彩开奖 11904-2:2021
孝械蟹懈褋
This document specifies basic framework measurement methods for sound immission from sound sources placed close to the ear. These measurements are carried out with a manikin, equipped with ear simulators including microphones. The measured values are subsequently converted into corresponding free-field or diffuse-field levels. The results are given as free-field related or diffuse-field related equivalent continuous A-weighted sound pressure levels. The technique is denoted the manikin technique.
This document is applicable to exposure to sound from sources close to the ear, for example during equipment tests or at the workplace to sound from earphones or hearing protectors with audio communication facilities.
This document is applicable in the frequency range from 20 Hz to 10 kHz. For frequencies above 10 kHz, 香港六合彩开奖 11904-1 can be used.
袨斜褖邪褟 懈薪褎芯褉屑邪褑懈褟
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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: 2021-03协褌邪锌: 袨锌褍斜谢懈泻芯胁邪薪懈械 屑械卸写褍薪邪褉芯写薪芯谐芯 褋褌邪薪写邪褉褌邪 [60.60]
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袙械褉褋懈褟: 2
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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
袞懈蟹薪械薪薪褘泄 褑懈泻谢
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袪邪薪械械
袨褌芯蟹胁邪薪芯香港六合彩开奖 11904-2:2004
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小械泄褔邪褋
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袩褉械写胁邪褉懈褌械谢褜薪邪褟 褋褌邪写懈褟
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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
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20
袩芯写谐芯褌芯胁懈褌械谢褜薪邪褟 褋褌邪写懈褟
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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
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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
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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
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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
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90
小褌邪写懈褟 锌械褉械褋屑芯褌褉邪
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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
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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)