If you carefully observe your phone, you are likely to have repaired in small points next to the load entrance. They are not ventilation slots or simple design ornaments. They are there for a very concrete reason and, although they go unnoticed, they result fundamental for the device to work As you expect in your day to day.
Most users do not pay attention to these tiny holes. However, anyone who has experienced calls with poor sound quality, choppy recordings or video call The consequences of neglecting them.
In many Android phones, the presence of one or more of these holes next to the cargo port is no coincidence. Its location does not obey aesthetic criteria, but technical: when they are in that area, they are very close to the mouth when we hold the mobile in a traditional call. But here comes the most interesting: It is not a hidden speaker or a strange sensor.
The answer is simple and, at the same time, surprising. These holes correspond to main microphones and, in some cases, secondary of the device. The first collects your voice for calls and recordings; The second detects background noises in order to filter them and improve the sharpness of the audio. The presence of two contiguous holes obeys this Sound cancellation system.
Instead, The iPhone bet on another strategy: They distribute their microphones in various points of the device, such as the lower area, next to the speakers, or next to the rear camera, depending on the model.
The importance of keeping them clean
Being such small holes, they usually accumulate dust, fluff or remains of dirt with daily use. This gradually deteriorates the quality of the sound and, in the case of the load input, it can even affect the energy that reaches the battery. Therefore, specialists recommend performing periodic cleaning.
Beyond this detail, keep the device protected with Case and screen protector, avoid extreme temperatures and using official loaders are essential customs to prolong the life of the mobile.