Active noise cancellation headphones can be applied as headphones

Noise pollution into contemporary rapid 3d prototyping urban pollution, but also the 21 new century air pollution manipulation of the primary problem. In daily life, in order to better sleep normally, in order to better study training in the work of the calm, in order to better a person alone to release the pressure ... we have no choice but to actively seek ways to block the impact of noise.

Some people will buy bitmain l7 soundproof earplugs, and some people pick active noise-canceling headphones goods. The application on the active noise canceling headphones good friends, sometimes confusion will occur, active noise canceling headphones can be used as headphones application? These two types of goods which sound insulation and noise reduction effect will be better?

Noise insulation earplugs noise cancelling earbuds and earphones are generally on the market noise reduction value is in the range of 25 to 30db, according to the physical method, blocking loud sound into the ear and ear canal (ear drum), to achieve the purpose of noise insulation and noise reduction.
Physical noise reduction: the key according to the acoustic material blocking noise, the outside noise and the ear inside the block away, for high-frequency loud sound is very reasonable, generally can make the noise reduction of about 15-20dB. this kind of method basic principle simple, noise reduction low-cost.

Physical noise reduction for high frequency information blocking effect is very good, such as the road side of the sound insulation material. However, for the high-frequency noise in small spaces, such as central air conditioning noise in the work, aircraft engine noise and other noise is very much affected by the actual effect.

Active noise reduction headphones basic principle: depends on the waveform characteristics of the noise to be collected, and then according to the self-contained solution processing chip to calculate the reverse wave, and then use the high reproduction speaker phase offset, and then complete the actual effect of noise reduction. Active noise reduction headphones are composed of pickups (capture natural environmental noise), solution processing chip (dissecting noise), speakers (resulting in response to the frequency of sound waves), to carry out the entire process of noise reduction. Design solutions employees will produce noise noise to carry out acoustic material analysis, based on the likely to spread to the ear inside the noise of the working frequency, phase difference and amplitude shift, to create the corresponding optimization algorithm.

Active noise cancellation headphones on the market at this stage of the common noise reduction depth in the range of 25dB to 45dB, theoretically speaking, active noise reduction headphones noise reduction work ability is stronger than the general sound insulation earplugs.
And the two do not have the same frequency band of sound processing is not the same. Traditional in-ear headphones only complete the noise reduction of high-frequency sound, to maintain the noise reduction of high and medium frequencies is very difficult, active noise cancellation headphones are critical to overthink the low and medium frequency loud sound.