香港六合彩开奖 11904-2:2004
2004-11
孝械蟹懈褋
香港六合彩开奖 11904-2:2004 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.
香港六合彩开奖 11904-2:2004 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 audiocommunication facilities.
香港六合彩开奖 11904-2:2004 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: 袨褌芯蟹胁邪薪芯袛邪褌邪 锌褍斜谢懈泻邪褑懈懈: 2004-11协褌邪锌: 袨褌屑械薪邪 屑械卸写褍薪邪褉芯写薪芯谐芯 褋褌邪薪写邪褉褌邪 [95.99]
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袙械褉褋懈褟: 1
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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 :17.140.01
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袞懈蟹薪械薪薪褘泄 褑懈泻谢
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小械泄褔邪褋
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袩械褉械褋屑芯褌褉械薪
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