Jiangyin sian is mainly responsible for hearing protection. People often ask whether earphones buy active noise reduction or passive noise reduction.
If the requirements for noise reduction are relatively high, you should buy active noise reduction. If the requirements are relatively low, you can buy passive noise reduction.This means that their prices are also different.
Active noise reduction headphones include active noise reduction and passive noise reduction, and passive noise reduction headphones only have passive noise reduction.
passive noise reduction
Passive noise reduction is actually physical sound insulation, such as: designing the head beam of the headset to be tighter and tighter (but this will cause problems such as head pain and wearing comfort not guaranteed); The body is acoustically optimized; place sound-absorbing materials inside the ear cups. In short, the purpose of noise isolation is achieved through various physical means.
Active noise reduction requires power supply, and needs to work with the microphone, PCB board and speaker. The microphone found noise, PCB operation, and the speaker produced a weighted reverse sound wave and noise superimposed, thereby eliminating the noise.
Active noise reduction
- The development time of passive noise-reduction earphones is longer than that of noise isolation through physical characteristics, and some soundproof materials are used to achieve shock absorption, sound absorption and sound insulation. At present, most noise reduction is passive noise reduction, which can isolate high-frequency noise, but it is relatively poor for low-frequency noise in a small space. This is also one of the reasons for the appearance of active noise reduction headphones.
- Active noise reduction has only been developed in recent years. Except for the use of some sound insulation materials, it is mainly used with built-in chips to achieve noise cancellation. The chip collects the waveform of the noise, and then calculates the reverse signal to cancel each other to achieve the purpose of eliminating noise. The noise reduction effect makes up for the lack of low frequency noise reduction of passive noise reduction headphones.
- Based on the understanding of the principle of noise reduction, some passive noise reduction headphones are often heavy, but the price of active noise reduction is relatively high due to the use of chips and the advantages of noise reduction effects.
- The application range of active noise reduction is relatively small, such as business people, e-sports players, high-end cars and so on. Passive noise-reduction headphones are more widely used, but overall the price of noise-reduction headphones is relatively high. Currently, due to the high price, the degree of promotion is not very high.
noise reduction
Therefore, it can also play a protective role in hearing, and I recommend buying headphones with passive noise reduction. Many in-ear headphones on the market use passive noise reduction.Our store has earphone earbuds that can be replaced with in-ear headphones.Silicone and sponge materials are available.