Ultra-quiet EC fan and decibel rating analogy

Ultra-quiet EC fan and decibel rating analogy：

In the market, many merchants will launch mute products. What is mute products? In fact, the definition standards of different industries are different, and the national standard is not clearly defined. The so-called mute and ultra-quiet products of merchants are generally corporate standards and are determined by manufacturers. However, in my country's national standard "Noise Limits for Household and Similar Electrical Appliances", there are mandatory regulations on the noise limits of home appliances. For example, the maximum noise limits of washing machines and dehydration are 62 decibels and 72 decibels respectively; The noise limit of the machine is 40-63 decibels.

 

From the perspective of human perception, generally less than 40 decibels can be called silent, and less than 20 decibels can be called ultra-quiet. For industries without national standards, we generally use this as the standard.

 

In an anechoic room with a background noise of 8dB-A, the minimum noise of our EC fan can reach 18dB-A, which is lower than 20dB, which can be called an ultra-quiet fan. According to the classification standard of human feeling, our company The small and medium size fans can reach the silent fan level.