Silent fan and decibel level analogy

On the market, many merchants will launch silent products. What are silent products? In fact, the definition standards of different industries are different, and the national standard is not clearly defined. The so-called silent and ultra-quiet of the merchants are generally corporate standards and are determined by the manufacturers. However, in my country’s National Standard on Noise Limits for Household and Similar Electrical Appliances, there are compulsory regulations on the noise limits of household appliances. For example, the maximum noise limits for washing and dehydration of washing machines are 62 decibels and 72 decibels respectively; according to the cooling power, air-conditioned rooms The limit of machine noise is 40-63 decibels.

From the perspective of human perception, it is generally less than 40 decibels, which 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, our 20x20x10mm and 25x25x7mm cooling fans can achieve the lowest noise of 18dB-A, which is less than 20 decibels. They can be called ultra-quiet fans, and according to the classification standard of human perception , Our small and medium size fans can reach the silent fan level.

Silent fan decibel level. For many people, the decibel of volume is a very abstract concept. Below we introduce the volume above 70 decibels by analogy:

190 decibels cause death

140 decibels The highest threshold defined by the European Union to cause complete hearing loss

139 decibels the shouts of World Cup fans

130 decibels sound of rocket launch

125 decibels The sound of a jet plane taking off

120 decibels. Staying in this environment for more than one minute will cause temporary deafness

110 decibels, the sound of a propeller plane taking off, the sound of a rock concert

105 decibels permanently damage hearing

100 decibels: the sound of pneumatic drilling rigs, the sound of compression hammers beating heavy objects

90 decibels noisy bar environment sound, electric saw sawing wood

85 decibels and below will not damage the hair cells in the cochlea

80 decibels noisy office, sound on the highway

75 dB upper limit of human ear comfort

70 decibels street ambient sound

Shenzhen Ruiapple Electronics Co., Ltd. was established in 2000. For 20 years, it has focused on R&D, manufacturing and sales of DC AXIAL FAN, AC AXIAL FAN, CENTRIFUGAL FAN, and blower ( BLOWER), AC to DC fan (EC FAN), DC motor (DC MOTOR), AC to DC (EC MOTOR) motor and other full series of heat dissipation and ventilation products as an integrity enterprise.

Shenzhen Ruiapple Electronics Co., Ltd. has its own brand "RUIAPPLE", which is registered as a patent trademark by the government. The company passed the ISO9001-2015 system certification in the early years. The series of cooling fan products have obtained UL, CUL, CE, CCC, ROHS and other international certifications.

Shenzhen Ruiapple Electronics Co., Ltd. is a professional fan manufacturer (the production plant Mianyang Anpu Electric Co., Ltd. was established in 2009 with the China Electronic Technology City Mianyang Economic Development Zone, Sichuan), with 20 years of R&D, production and sales experience. Our research and development, quality control and production always pay close attention to new technologies and new methods to pursue the goal of zero defects, continuously improve product quality and stability, improve products, innovate products, and lean production. Our product quality and production technology have always been in the forefront of the industry, with complete product specifications and comprehensive market competitive advantages.

Shenzhen Ruiapple Electronics Co., Ltd. has a strong R&D team, which has been dedicated to product research and development for many years, providing customers with complete heat dissipation solutions, striving for perfection, improving processes, and optimizing performance. It is targeted at consumer goods, office equipment, aerospace industry, automotive electronics, Ventilation system, machinery equipment, communication equipment and other industries conduct special research and provide products for the industry characteristics of the application of heat dissipation and ventilation products.