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Home / News > Noise reduction headset technology - Noise reduction headset classification and noise reduction process

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Noise reduction headset technology - Noise reduction headset classification and noise reduction process

When you wear a specially designed headset, the outside noise will no longer cause interference to you. This is the noise reduction headphones to bring us to enjoy. Why noise reduction headphones can have such a magical performance? This article will take you into the world of noise-canceling headphones.

Noise reduction headset classification

Can effectively reduce the environmental noise of the headset is what we call noise reduction headphones. Objectively speaking, almost all headphones in the design of the beginning to consider how to reduce the external noise, but the noise reduction headphones in the noise reduction in the more consideration, has a more prominent performance.

Noise reduction headphones in accordance with the principle is divided into two types: one is passive noise reduction (Passive Noise-Canceling) headphones, the other is active noise reduction (Active Noise-Canceling) headphones. The so-called passive noise reduction headphones, that is, through the headphones on the sound insulation material or a special structure, try to cut off the noise.

Previously we introduced the ear earphones and large ear design headphones, can be divided into passive noise reduction headphones. Even the following we study the active noise reduction headphones, also joined the passive noise reduction headset design. Of course, these are not strictly bounds because there is only one purpose: how to more effectively reduce environmental noise.

And active noise reduction headphones, headphones are set in a special noise reduction circuit. Generally through the audio receiver (such as micro-microphone) and anti-noise output chip, by receiving, analyzing the frequency of external noise and produce the opposite frequency, mutual weakening or offset, so as to achieve the purpose of beats by dre wireless shielding noise.

Eliminate the noise process

Active Noise Canceling The headset processes from the beginning to the ear to hear the sound, which can be divided into several steps - first, by the microphones placed in the headset to collect the middle / low frequency noise in the ear can hear the environment (such as 100Hz ~ 1000Hz); then, the noise signal to the noise reduction circuit, noise reduction circuit for real-time operation; in the noise reduction circuit processing is completed, the signal generated by the speaker and the noise phase of the opposite, amplitude of the same sound waves to offset the noise; Finally, our ears will feel the noise weakened or even disappeared.

In short, the use of micro-microphone noise collection, noise reduction through the noise phase phase 180 degrees, and produce the corresponding anti-noise offset each other. In general, active noise reduction headphones is the effect is very obvious.