How does the micro fan manufacturer test the noise?

The noise index of a micro fan is an important parameter that customers are more concerned about. Generally, when a manufacturer provides a micro fan, it will also provide the corresponding specification. One item is the noise value, in decibels (db). Then, the micro fan manufacturer How to control fan noise? The noise of the micro fan mainly controls the following two items. First, the wind noise when the fan is running (this is related to the speed, high speed, and louder wind noise). Therefore, the wind noise can be effectively controlled by controlling the speed of the micro fan. In view of wind noise, the cooling fan manufacturer asked a professional organization to build a soundproof room with a background noise of 16DB. Because there is almost no sound, we call it an anechoic room. Then, the micro fan without other noises is separated from the sound. The distance of the instrument is 100 cm, and the noise value is tested. Second, when the fan is rotating, mechanical noise, friction, electromagnetic sound, and jittering sound, except for wind, are all content to be controlled. For mechanical noise, friction sound, and electromagnetic sound, we use human ear audiometry in a relatively quiet soundproof room. The shaking sound is tested by hand-feel sample comparison. Welcome to the heat dissipation classroom and news center of the cooling fan manufacturer again. The copyright belongs to the cooling fan manufacturer and represents only personal opinions. Please do not reprint the whole article. Any violation will be held for legal responsibility. If you need to know more about the cooling fan manufacturer's product introduction, please Click Product Center