The principle of foldable active noise cancelling headphone is very simple. The propagation of sound is achieved through the vibration of the medium. If the waves are in antiphase, they will be cancelled under theoretical conditions. ANC will create a completely opposite sound through the processor to neutralize and eliminate the noise. This is called "destructive interference" in acoustics.

Advantages of active noise cancelling headphone:

The sound quality is pure and beautiful. ANC makes up for the lack of passive noise reduction in low-frequency noise reduction, and brings users a more pure sound quality. For example, the noise in public places, the rumble of cars and trains, etc., are more suitable for the user's scene.

Protect the user's hearing. ANC headphones are equipped with exclusive noise reduction circuits, including custom-made high-sensitivity MEMS silicon microphones and professional noise reduction chips, which cancel the noise by receiving and analyzing the external noise spectrum and generating signals of the opposite phase. Why do you say that? We assume that the surrounding noise (decibel (dB)) remains unchanged, and the volume of the mobile phone that can meet the listening needs without noise-canceling headphones is 20 bars; It takes 10 frames to meet the listening needs. So from this perspective, the protective effect of noise-canceling headphones on hearing is still very prominent.

Disadvantages of active noise cancelling headphone:

high cost. However, the necessary equipment for the active noise reduction system is a pickup, a processing chip, and a speaker. Each part must be of high quality to achieve the final effect, so the cost is higher.

Energy consumption. The foldable active noise cancelling headphone contains an acoustic processor, etc., so turning on the active noise reduction mode will have some adverse effects on the battery life of the wireless headset.

Active noise cancelling and passive noise cancelling have their own advantages and disadvantages. You should choose the headphones that suit you according to your preferences and needs.