Passive noise reduction is a technology that eliminates external noise and is achieved through "sound insulation". It is different from active noise reduction. Active noise reduction is achieved by using external noise reduction devices, which emit anti acoustic waves from the outside to counteract the noise. Passive noise reduction is achieved through physical barriers to block noise and external sounds, allowing people to focus more on their auditory experience.
There are three main methods for passive noise reduction: one is to use thickened shell materials to provide better sound absorption performance; Second, isolation materials such as sound insulation pad and foam plastic are used to separate the inner cavity from the outside; The third is to use double-layer soundproof windows, adding a layer of double-layer soundproof glass on the outside of the windows to reduce the interference of external noise on the interior.
Passive noise reduction technology is widely used in airports, factories, large shopping malls, conference rooms, and performance venues to create a better auditory environment and improve efficiency. At the same time, passive noise reduction is also gradually applied to consumer electronics, such as headphones and speakers, so that users can get a better experience in entertainment and communication.
In short, passive noise reduction is an effective technology for eliminating external noise, achieved through sound insulation physical barriers, providing people with a better auditory experience and work/entertainment environment.
