The Introduction of ANC Earphone

As one of the accessories of mobile phones, earphones have gradually become an indispensable part of people. However, different types of headphones have different performance characteristics and advantages. Next, in this blog, I will mainly introduce a new type of earphone - ANC earphones.

What is ANC Earphone?

I believe everyone is very curious about the ANC earphone. What is its working principle? I hope that through the following detailed description, readers can better understand the principle of Active Noise Cancellation (ANC).

How does the ANC Earphone Work?

Active noise reduction is to generate reverse sound waves equal to the external noise through the noise reduction system, neutralize the noise, and achieve the effect of noise reduction.

ANC earphones can actively detect ambient low-frequency noise (100-1Hz) audible to the human ear, and then transmit the noise signal to the control circuit. The control circuit performs real-time calculations, and the noise can be offset by emitting sound waves with the opposite phase and the same amplitude as the noise through the speaker.

ANC earphones come with noise-canceling circuitry to combat outside noise. To achieve the noise reduction effect through the hardware mechanism, the internal components are a pickup (environmental noise), a processing chip (analyzing noise), and a speaker (producing echo sound waves).

The Distinction Between Active and Passive:

Noise-canceling headphones are divided into ANC earphones and passive noise-canceling headphones. Compared with the main ANC earphone, the earphones that emphasize the sound isolation mechanism are called passive noise-canceling earphones or noise-isolating earphones. But the mechanism is different from the active one. Its main purpose is to isolate and prevent noise from entering the ear canal, which is determined by the material and tightness of the earplugs.

Benefits of Active Noise Cancellation:

The anti-noise mechanism allows one to enjoy music without raising the volume too much. You can also just use the noise reduction function without playing music. The ANC earphone can help passengers on planes or trains sleep. It does not turn on too much volume of music due to excessive ambient noise, which will cause long-term ear damage.

Is the ANC Earphone Invulnerable?

Noise-canceling headphones typically use ANC to cancel low-frequency noise and actively cancel high-frequency noise.

The frequency that the human ear can hear is 20HZ-20KHZ, the frequency range of the human voice is 100HZ-8KHZ, and most environmental and vehicle noises are in the range of 100HZ-1KHZ.

The noise reduction frequency band of ANC earphones on the market is 100HZ-1KHZ. Even good noise-canceling headphones can't cover the full range of speech. Therefore, the noise reduction effect for speech cannot reach the noise reduction effect of ambient sound.

High-frequency noise still has to rely on traditional sound insulation mechanisms. To truly eliminate high-frequency noise, the sensor and microphone must be placed next to the listener's eardrum, so it's not technically possible yet.

In the End

In short, compared with traditional earphones, ANC earphones have incomparable advantages. If you want to buy ANC earphones wholesale, please contact us. As a professional ANC earphone factory, we can provide you with the best products.