loading

Professional manufacturing and production of radiator cooling fans, condenser fans and fan motors, etc.

The knowledge about noise

Fan noise test

basis CNS8753 test specification. As shown in the sketch placed fan in background noise below 15 decibels of no sound in the room, a 1 meter distance noise meter, measure the suction fan surface, through the computer to collect measured data after the draw materials and sound pressure a prospective trend diagram can, octave band sound pressure level must chart and so on.

how noise said the strength of the human ear to listen to voa, actually varies with the frequency of the sound, for example, in 1000 hz people particularly sensitive to the ear, so the same sound pressure of the two different frequency, that the frequency of 1000 hz its volume is bigger. What the difference between music and noise is sounds comfortable or not, the sonic and not two. The human ear can hear the voice of intensity level ( SIL) Can the type said: SIL = log I/Io ( Bel) Or lO the log ( I/10*- 12 ( W/m*2) ) The Db Io: hear the voice of minimum intensity ( 10 * - 12 ( W/m*2) ) I: the intensity of the sound < W/m * 2 > in addition, also can use the sound pressure, said: L = log p * 2 * 2 / Po < Bel > or < dB > 10 log p/Po Po: minimum can listen to voa press < N/m * 2 > p: sound pressure < W/m * 2 >

GET IN TOUCH WITH Us
recommended articles
knowledge Info Center
Many of our low-demand customers often go to the electronics market or the so-called wholesale department to buy cooling fans.

Automobile radiator fan factory is a cooling fan manufacturer integrating Ru0026D, production and sales.
Recently, we dealt with a case of changing the installation method of the cooling fan, which has a great impact on the cooling fan.

During normal use of any electronic product, due to the effect of current, there will be varying degrees of temperature rise inside the device, and when the temperature rise of the device exceeds a certain range, its life will be attenuated to varying degrees (for a long time, The safety of equipment operation will also be reduced).
Car cooling fan working position and its principle: cooling fan working principle 1.

The comprehensive laboratory of the automobile radiator fan factory has introduced new equipment-the thermal shock test box.
The commonly used cooling fan voltage is generally 12V, but some customers' products, such as temperature-controlled cooling fans, set a lower voltage for the cooling fan at low temperatures.
When we choose a cooling fan, especially for certain voltages that are not very stable or have several different voltage gears for speed adjustment, we need to understand the voltage range of the cooling fan, such as a cooling fan that works with a 12V DC voltage.
no data
Ready to work with us ?
Find us here: 
After nearly 20 years of hard work, the factory has grown from an unknown family workshop to an industry leader with a complete management system and independent research, development and manufacturing capabilities.
Contact us
Tel: +86 - 576-8625 9388 
Fax: +86 - 576 - 8625 9008

Address:
No. 58-11, Jintang North Road, East Wenling New District, Taizhou City, Zhejiang Province, China
Copyright © 2025 TONGCHI | Sitemap| Privacy Policy
Customer service
detect