Airwell Wespak 4.05 [15/28] Sound data

Airwell Wespak 4.05 [15/28] Sound data
Page 15
Sound Data
Hz 125 250 500 1000 2000 4000
Lw (dBA) LwA + 3 - ∆Lw LwA + 3 - ∆Lw LwA + 3 - ∆Lw LwA + 3 - ∆Lw LwA + 3 - ∆Lw LwA + 3 - ∆Lw
Fan sound power levels Lw
Hz 125 250 500 1000 2000 4000
Attenuation (dB) 7.7 8.8 15.2 22.7 21.4 19.6
Silencer sound attenuation
Hz 125 250 500 1000 2000 4000
Attenuation (dB) 3.7 8.6 12.5 10.5 13.3 18.1
Casing sound attenuation
In-duct sound levels
In-duct sound levels are obtained by deducting silencer sound attenuation from fan sound levels.
Radiated sound levels
Radiated sound levels are obtained by deducting casing sound attenuation from fan sound levels.
LwA : Global sound power level in dBA obtained from fan chart.
Hz 125 250 500 1000 2000 4000
∆Lw 21 12 10 4.1 5.5 9
∆Lw values - Wespak 4.05 & 5.05
Hz 125 250 500 1000 2000 4000
∆Lw 21 14 9 3.6 6.2 9
∆Lw values - Wespak 6.05

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