Efficient Sound Insulation and Quiet Enjoyment of the World
There are two kinds of noise reduction methods for headphones, active and passive.
The active noise reduction function is to neutralize the noise by generating the reverse sound wave equal to the external noise through the noise reduction system, so as to achieve the effect of noise reduction. Active noise reduction headphones are equipped with noise reduction circuits to counteract external noise. Most of them adopt larger head-mounted design. They can block external noise by using cotton earplugs and headphone housing, and carry out the first round sound insulation. At the same time, active noise reduction circuits and power supply are installed in order to have sufficient space.
Passive noise reduction headphones mainly enclose the ear to form a closed space, or use silica gel earplugs and other sound insulation materials to block external noise. Because the noise is not processed by the noise reduction circuit chip, it can only block the high-frequency noise, and the effect of low-frequency noise reduction is not obvious.
Big Sen state
Benefiting the Society and Improving the Quality of Human Life
The registered capital is 10 million RMB. It is located in Baihuadong Community, Guangming New Area, Shenzhen. Guangming New Area is far from Baoan International Airport. Chang, Shekou Port and Dashonwan Port are about 25 minutes'drive away. Hong Kong, Huizhou, Dongguan and other major urban centers in the Pearl River Delta have formed a convenient and efficient "half-hour life circle". Is a collection of medical health.
High-tech enterprises integrating R&D, production and sales of disposable medical nursing products, with core special technology as the leading factor, exquisite R&D team, leading production technology and high-quality service, have made the company stand in the tide of economic globalization and fierce market, and the products sell well all over the world and exported to Europe. The United States, the Middle East, Southeast Asia, Africa and other countries have won unanimous recognition and praise from customers.