等級
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計權隔聲量Rw,dB
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Ⅰ
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Rw≥45
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Ⅱ
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45>Rw≥40
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Ⅲ
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40>Rw≥35
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Ⅳ
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35>Rw≥30
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Ⅴ
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30>Rw≥25
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1/3倍頻帶規(guī)范化聲壓級差,dB
|
計權隔聲量,dB
|
|||||||
100
|
125
|
160
|
200
|
250
|
315
|
400
|
500
|
|
|
|
|
|
|
|
|
|
|
630
|
800
|
1000
|
1250
|
1600
|
2000
|
2500
|
3150
|
|
|
|
|
|
|
|
|
|
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環(huán)境溫度
℃
|