What is passive noise reduction

Passive noise reduction is a technology that reduces external noise through physical isolation and isolation materials, with the aim of isolating a certain amount of noise from the outside to protect users from its impact. The principle of passive noise reduction is to isolate external sound by using isolation materials. For example, the passive noise reduction technology of headphones uses soundproofing materials to wrap the earshell and transmit external sound unidirectionally to your ears, thereby reducing the interference of environmental noise. Passive noise reduction technology usually cannot eliminate sound noise, but it can significantly reduce the impact of noise, making us more comfortable when working, studying, or resting. Passive noise reduction technology is currently one of the common noise control schemes, with the advantages of no power supply, small size, and wide applicability, making it suitable for various scenarios.