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If the requirements for noise reduction are relatively high, you should buy active noise reduction, and if the requirements are relatively low, you can buy passive noise reduction. Over Ear Active Noise Cancelling Headphones include active noise-cancelling and passive noise-cancelling, while passive noise-cancelling headphones have only the passive noise-cancelling part.

 

Passive noise reduction is actually physical sound insulation, such as: design the head beam of the headset tighter and tighter; optimize the acoustics of the earmuff cavity; put sound-absorbing materials inside the earmuffs. In short, the purpose of isolating noise is achieved through various physical means.

 

Active noise reduction requires power supply, and requires a combination of microphones, PCB boards and speakers. The microphone finds the noise, the PCB operation, the speaker creates a reverse sound wave and the noise superimposes, thereby canceling the noise.

 

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