Nowadays, mobile phones have become the necessities of our daily work and life. It can be said that we can't look up without looking down. So the question is, are you really familiar with the appearance design of your mobile phone?

I don't know if you have found that no matter what brand your mobile phone is, there will be some small holes on the top of the phone, some at the bottom of the phone, some at the top or back of the phone. If it's just a simple decoration, it's obviously not necessary, so what's the role of these holes? Why do they have to exist?

Note that these holes aren't

These at the bottom of the phone

Next to the headphone jack

But cell phones are different. A lot of users mistakenly put these things

The cell phone itself is a communication tool, and these small holes have the most to do with our daily calls, they areDual mic noise reduction technology, which uses two microphones to reduce environmental noise.

In general, mobile phones have two mic holes. Among them, the bottom is used to collect the user's voice, while the top is responsible for dealing with the surrounding environmental noise.

Specifically, the earpiece is on the top of the mobile phone and the microphone is on the bottom of the mobile phone. The sound decibels received by the two adjacent microphones are different, usually 6 dB apart. At this time, the system will screen out the part of the ambient sound collected by the two mics, which is close to the decibel, and determine it as noise. Releasing the opposite sound wave as compensation effectively cancels out this part of the sound, and finally only outputs pure human voice.

And with these two MIC holes, even if we're talking on the phone in a noisy environment, there's no need to worry about the quality of the call.

Methods of daily maintenance and cleaning

If your work environment is dusty, your mobile phone needs to be cleaned up frequently. If there is too much dust blocking the small hole, the transmitted sound will be very noisy, and the quality of the call can not be guaranteed.

The easiest way is to clean it with a toothbrush. You can choose a fine and soft toothbrush, and gently sweep all the small holes on the mobile phone several times, and then blow with a small blower to clean the dust around the small holes.

In addition, you can choose to use toothpick double-sided glue method cleaning. First, remove the tip at both ends of the toothpick, and wrap a small strip of double-sided glue around one end. Second, use the wrapped end to remove the dust from the noise reduction.

By contrast, cleaning with a toothbrush is obviously more convenient and safer, but if you do

Write at the end

Know the meaning of every design on your phone, like this

Now we've got this on the phone

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