TWS headphones, shut up the world

For a long time, noise-canceling headphones are not only the favorite of music enthusiasts, but also sports experts. Slowly, in addition to certain groups of people, more and more people began to pursue the "world of self".

At present, there are two types of noise reduction headphones: active noise reduction headphones and passive noise reduction headphones.

The so-called active noise reduction is different from passive noise reduction that blocks your ears, but emits a sound that is opposite to the environmental sound waveform to cancel out the noise.

Passive noise reduction:Before talking about active noise reduction, let's talk about passive noise reduction first. Passive noise reduction is a general term for using a combination of plastic, foam, woven mesh and other composite materials to achieve purely physical noise reduction methods, such as the US military headsets we often see on TV, or those used by airport ground crews The headphones with oversized earmuffs are basically passive noise-cancelling headphones.

Passive noise reduction earphones mainly rely on good airtightness and material characteristics to keep noise out, but passive noise reduction generally can only target higher frequency sounds above 500Hz, especially for noise above 1KHz, which are mostly closed Earphones will show a certain degree of passive noise reduction ability, but if you want to get better noise reduction effect and deal with low-frequency noise, you need to pay a great price (the research of materials science is a big project!) Passive noise reduction is powerless for many low-frequency noises, which has contributed to the development of active noise reduction.

Why have noise-canceling headphones been tepid?

In fact, since active noise-canceling earphones have been specialized for civilian use, they have always been a niche market. First of all, there are not so many people who need to fly for a long time. Although active noise-canceling earphones have entered the general consumer market in recent years, But its main publicity is still tied to the aircraft, and the distance from the general consumer is still relatively large.

However, in recent years, there has been a good trend that in some headset products, the noise reduction function has become standard. For example, brands such as UE, BEATS, and Magic Voice have popularized the noise reduction function in headsets, although these brands It is not the main noise reduction effect, and there is a gap between the noise reduction level of several established headset manufacturers, but maybe this is the beginning of noise reduction technology really starting to enter the homes of ordinary people.