Source: Zhongguancun Online
Mobile phones have now become a necessity in our daily work and life. So question is, are you really familiar with design of your mobile phone?
I don't know if you've noticed that no matter what brand your mobile phone is, there will be small, inconspicuous holes on case, some at bottom of phone and some at top or back. telephone. If this is just a decoration, then it is clearly not needed, so what is the function of these small holes? Why should they exist?
Please note that these holes are not "reset buttons"
Typically, these "small holes" on bottom of a mobile phone are near headphone jack, SIM card slot, etc. We know that there are many laptops on market with a reset button feature. crashes or system crashes, poke with a needle Press reset button to reset computer to factory settings.
What is "small hole" next to headphone jack?
Mobile phones, however, are different. Many users mistakenly think of these "little holes" as reset buttons without realizing it, and some people don't even use it as a card slot...call!
The mobile phone itself is a means of communication, and these little holes are most associated with our daily phone calls. These are "noise canceling microphones" which are mainly used for noise reduction. This technology is called Dual Microphone Noise Canceling Technology. y Microphone to reduce ambient noise.
Typically, mobile phones have two microphone holes. Among them, lower one is used to collect user's voice, and upper one is in charge of processing ambient noise of environment.
Specifically, speaker is on top of phone and microphone is on bottom. The level of sound received by two adjacent microphones varies and is typically 6 dB. At this time, system filters out that part of surrounding sound collected by two microphones, which is close in decibels, and evaluates it as noise. Release opposite sound wave as compensation, which effectively cancels out this part of sound, and finally outputs only pure human voice.
With these two microphone holes, even if we're talking on phone in a noisy environment, we don't have to worry about call quality.
Daily care and cleaning methods
If your workspace is dusty, your phone still needs to be cleaned frequently. If too much dust closes small hole, transmitted sound will be very noisy and call quality cannot be guaranteed.
The easiest way to clean it is with a toothbrush. You can choose a soft-bristled toothbrush, gently rub all small holes on phone several times, and then blow it with a small hair dryer to remove dust around small holes.
You can also use toothpicks and double-sided tape for cleaning. First, remove tips from both ends of toothpick, and then wrap one end with double-sided tape cut into small strips. Second, use wrapped end to poke dust out of noise canceling microphone.
In comparison, toothbrushing is obviously more convenient and safer, but if you have "obsessive-compulsive disorder" it's a good idea to find a professional to clean your cell phone (local tyrants are free to change phones).
Write at end
You should know that every picture on a mobile phone has its own meaning, as well as those "little holes" that seem invisible, but play a very important role. If there are problems with your mobile phone's daily ringing, voice, etc., and malfunctions at system level are fixed, then mobile phone's noise reduction microphone must be damaged.
Now everyone understands importance of these "small holes" in mobile phones, so daily maintenance is still very important, especially do not use them as a "reset button" or "card slot", after all, it costs money to repair It's not worth hassle. Finally, do you have a habit of cleaning your mobile phone frequently? Tell me your cleaning tips and share with everyone~