Although it goes unnoticed by many users, Most mobile phones have a small round hole located very close to the cargo port. His presence has generated curiosity and even confusion among those who do not know their usefulness, some come to think that it is a simple design detail. However, this tiny hole fulfills a fundamental technical function.
It is, in reality, One of the secondary microphones of the device. Modern smartphones usually incorporate several microphones distributed in different areas of the housing. The one that is located next to the cargo port is usually intended to improve sound capture during calls, recordings or video calls, and to facilitate noise cancellation.
Thanks to these additional microphones, The phone can distinguish the ambient sound from which it really interests to capture (like the user’s voice)and thus offer a better audio quality, cleaner and without interference. This system is especially useful in noisy environments, such as the street or crowded places.
It is important not to introduce objects or manipulate this hole, since it could damage the microphone and affect the performance of the audio functions.
In short, that small point that almost nobody note is key for the communication and multimedia experience on your mobile to be much clearer and more effective.