Active Noise Cancellation is to take the initiative to reduce noise. How did you do it? To put it simply, it is to collect the noise of the surrounding environment through the microphone. Through digital analysis, the reverse sound wave is used for processing to realize the cancellation between the sound waves and complete the noise reduction.

The main factors that affect the noise reduction capability of headphones include:

1. The ability of the microphone of active noise cancelling earbuds to detect external noise. The higher the sensitivity of the microphone, the stronger the ability to detect noise.

2. The ability of noise reduction chip to analyze and process external noise signals. The noise reduction chip must have the ability to analyze regular high-frequency, intermediate-frequency, and low-frequency noise signals, as well as the ability to analyze irregular noise signals.

3. The ability of the anti-noise signal (inverted wave) generated by foldable noise cancelling headphones to cancel external noise. The anti-noise signal must be able to offset external noise well.

4. The "noise reduction signal space" should try to avoid the entry of extraneous noise from the outside, that is, the earphone should be well sealed, and it can block the entry of excess noise through physical barriers. Because there is already a noise signal in the "noise reduction signal space" There are two types of sound waves and anti-noise signals. If the earphones are poorly sealed and the "noise reduction signal space" leaks into the third sound wave signal (excess external noise), the noise reduction effect will be greatly reduced.

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