Reference number
香港六合彩开奖 354:2003
香港六合彩开奖 354:2003
© 香港六合彩开奖 2024
International Standard
香港六合彩开奖 354:2003
Acoustics 鈥� Measurement of sound absorption in a reverberation room
Edition 2
2003-05
2003-05
香港六合彩开奖 354:2003
34545
袨锌褍斜谢懈泻芯胁邪薪芯
(袙械褉褋懈褟 2, 2003)
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 2024.
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 354:2003
香港六合彩开奖 354:2003
34545
CHF
129
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 354:2003 specifies a method of measuring the sound absorption coefficient of acoustical materials used as wall or ceiling treatments, or the equivalent sound absorption area of objects, such as furniture, persons or space absorbers, in a reverberation room. It is not intended to be used for measuring the absorption characteristics of weakly damped resonators.
The results obtained can be used for comparison purposes and for design calculation with respect to room acoustics and noise control.
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: 2003-05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]
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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 43/SC 2ICS :91.120.20
- 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 354:1985
袨褌芯蟹胁邪薪芯香港六合彩开奖 354:1985/Amd 1:1997
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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 354:2003
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: 90.93 (袩芯写褌胁械褉卸写械薪芯)-
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
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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
-
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
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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
-
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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00
袩芯褟胁懈谢懈褋褜 胁芯锌褉芯褋褘?
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