Cooling fan noise value
the value of the noise of the cooling fan in the background noise below 15 dba without measurement in the reverberation chamber, for the fan running away from the tuyere in free air one to put a noise meter, fan noise values are usually with high voltage level ( SPC) The octave band of paint, db ( dbA) Effect, which is formed by the change as shown in the following symptom
& gt; 3 dbA almost no feeling, & gt; 5 the dba could feel that & gt; 10 the dba feel twice as big.
& gt; 0 - 20 the dba is very weak, & gt; 20 - Faint, 40 dba & gt; 40 - 60 dba moderate, & gt; 60 - 80 dba loudly, & gt; 80 - 100 dba very loudly, & gt; 100 - 140 was deafening. Wenling city tong chi auto air conditioning manufacturing co. , LTD. , specializing in the production of cooling fans.