Service Hotline：400-187-9588
13162785999
The noise of the hxht fan is measured in a non reverberation room with a background noise of less than 15dba. The fan to be tested operates in free air, and a noise meter is disposed one meter away from the air inlet.
The sound pressure level depends on the background factors, and the sound power level is expressed by the following formula:
SPL=20logP/Pref
And swl=10logw/wref
P= sound pressure
Pref= reference sound pressure
W= noise energy of sound source
Wref= noise energy of sound source
The noise value of the fan is usually plotted in the octave band of sound pressure level (SPL). The effect caused by the change of decibel (DBA) is shown in the following symptoms:
3 DBA almost no feeling
5 DBA feel it
10 DBA feels twice as loud
Noise level:
0 ~ 20 DBA is weak
20~40 DBA weak
40~60 DBA moderate
60~80dba loud
80-100 DBA very loud
100`140 DBA deafening
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Shenkui Intelligent Technology (Shanghai) Co., LTD.
Address: Shanghai lingang XuanChun sanzao industrial park road 172, 9 plants
Guangzhou: No.4, Lane 8, Rongwei Road, Huadong Town, Huadu District, Guangzhou
Customer service phone：13162785999 QQ：85751083
TEL:021-51087809
FAX:021-51687808
E-mail:shengkwei@shengkwei.com.cn
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