Noise-cancelling headphones are generally divided into two types: active noise-cancelling and passive noise-cancelling. Headphone holster manufacturers will give you a general overview. Passive noise-cancelling refers to general headphones, which achieve noise-cancelling effect by blocking the external sound wave propagation of the ear canal. In other words, it is the same as the principle of plugging your ears with your hands, but active noise reduction is relatively advanced. It reduces or even offsets the noise by acquiring the sound wave waveform of external noise and generating sound waves in the opposite direction.

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Generally speaking, the price of active noise-cancelling headphones ranges from 300 to 2000. It should be noted that active noise-cancelling headphones are generally reflected in the market, and the effect they can achieve is not very satisfactory.

The damage to the ear is not only the difference between in-ear and ordinary earplugs, but also has something to do with the sound unit. Generally speaking, some brands of headphones focus on bass (generally found in Japan and South Korea). Personally, I think it is necessary to achieve a rhythm like a disco There must be a certain degree of sacrifice to the health of the ears. Some brands of headphones focus on the restoration of the sound source, and even attenuate a part of the low frequency (common in Europe and the United States). I think this kind of headphones is relatively less harmful to the ears.

I don’t know much about domestic brand earphones. It is recommended to buy from regular e-commerce companies such as JD.com and Zhuoyue.

Headphone holster manufacturers believe that the ones that have the least impact on hearing are active noise-cancelling in-ear headphones, but in general, enthusiasts will not buy such headphones because it will affect the sound quality. And the general low-end active noise reduction effect is also general.