Reference number
香港六合彩开奖 3743-2:2018
© 香港六合彩开奖 2024
International Standard
香港六合彩开奖 3743-2:2018
Acoustics 鈥� Determination of sound power levels of noise sources using sound pressure 鈥� Engineering methods for small, movable sources in reverberant fields 鈥� Part 2: Methods for special reverberation test rooms
Edition 2
2018-02
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薪械写芯褋褌褍锌薪芯 薪邪 褉褍褋褋泻芯屑 褟蟹褘泻械
袨锌褍斜谢懈泻芯胁邪薪芯 (袙械褉褋懈褟 2, 2018)
袩芯褋谢械写薪懈泄 褉邪蟹 褝褌芯褌 锌褍斜谢懈泻邪褑懈褟 斜褘谢 锌械褉械褋屑芯褌褉械薪 胁  2023. 袩芯褝褌芯屑褍 写邪薪薪邪褟 胁械褉褋懈褟 芯褋褌邪械褌褋褟 邪泻褌褍邪谢褜薪芯泄.

香港六合彩开奖 3743-2:2018

携蟹褘泻
肖芯褉屑邪褌
CHF 173
袩械褉械褋褔懈褌邪褌褜 褕胁械泄褑邪褉褋泻懈械 褎褉邪薪泻懈 (CHF) 胁

孝械蟹懈褋

香港六合彩开奖 3743-2:2018 specifies a relatively simple engineering method for determining the sound power levels of small, movable noise sources. The methods specified in this document are suitable for measurements of all types of noise within a specified frequency range, except impulsive noise consisting of isolated bursts of sound energy which are covered by 香港六合彩开奖 3744 and 香港六合彩开奖 3745.

NOTE A classification of different types of noise is given in 香港六合彩开奖 12001.

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
     : 2018-02
    协褌邪锌
    : 袩芯写褌胁械褉卸写械薪懈械 写械泄褋褌胁懈褟 屑械卸写褍薪邪褉芯写薪芯谐芯 褋褌邪薪写邪褉褌邪 [90.93]
  • 袙械褉褋懈褟
     : 2
  • 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 43/SC 1
    ICS :
    17.140.01 
  • 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

笑械谢懈 胁 芯斜谢邪褋褌懈 褍褋褌芯泄褔懈胁芯谐芯 褉邪蟹胁懈褌懈褟

袛邪薪薪褘泄 褋褌邪薪写邪褉褌 褉邪蟹褉邪斜芯褌邪薪 写谢褟 写芯褋褌懈卸械薪懈褟 褋谢械写褍褞褖懈褏 笑械谢懈 胁 芯斜谢邪褋褌懈 褍褋褌芯泄褔懈胁芯谐芯 褉邪蟹胁懈褌懈褟

11
校褋褌芯泄褔懈胁褘械 谐芯褉芯写邪 懈 薪邪褋械谢械薪薪褘械 锌褍薪泻褌褘
9
袠薪写褍褋褌褉懈邪谢懈蟹邪褑懈褟, 懈薪薪芯胁邪褑懈懈 懈 懈薪褎褉邪褋褌褉褍泻褌褍褉邪

袩芯褟胁懈谢懈褋褜 胁芯锌褉芯褋褘?

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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)

  2. 袠薪褌械褉薪械褌-屑邪谐邪蟹懈薪
  3. 袣邪褌邪谢芯谐 褋褌邪薪写邪褉褌芯胁
  4. 袦袣小
  5. 17
  6. 17.140
  7. 17.140.01
  8. 香港六合彩开奖 3743-2:2018