What is a microphone against noise, how does it work?

We often see on some smartphones there is a small dot with special use that few people know. So what is its use after all?

We often see on some smartphones there is a small dot with special use that few people know. Perhaps you are thinking that it has a cooling effect on the phone? But the answer is not that. That small dot is very beneficial and it is a secondary microphone that has noise-canceling effects in recording and conversation. Please refer to the article below to understand more details.

Why on iPhone headphones appear small holes?

What is microphone against noise?

Noise-canceling microphone is a technology that helps eliminate noise in the environment so that the voice of the speaker is clear, not mixed by the noise.

What is a microphone against noise, how does it work? Picture 1 What is a microphone against noise, how does it work? Picture 1

Microphone technology was developed by Apple first on iPhone 4, if you notice it, next to the headphone jack of iPhone 4 has a small hole and that is the noise-proof microphone. Currently, this technology has appeared on many mobile devices such as Samsung Galaxy S7 phones, Samsung S8, iPhone 6s, iPhone 7, iPhone 8, iPhone X, HTC One M9s, .

What is a microphone against noise, how does it work? Picture 2 What is a microphone against noise, how does it work? Picture 2

Usually devices equipped with noise-proof technology will have 2 mics, 1 recording mic and 1 noise microphone. Therefore, when talking or recording, sound quality becomes better and does not affect the hearing of the user.

Microphone operation principle

Noise-canceling microphones only work well in conditions of noise away from the speaker, if the external noise is near and too loud, the noise quality is less effective.

What is a microphone against noise, how does it work? Picture 3 What is a microphone against noise, how does it work? Picture 3

For low-frequency distant noise, the noise-canceling microphone is capable of absorbing these noises and removing it. Meanwhile, the sounds near the phone have higher frequencies, the main microphone will record the audio, such as voice, voice recording, .

What is a microphone against noise, how does it work? Picture 4 What is a microphone against noise, how does it work? Picture 4

Besides, this noise-canceling sub-microphone system is smart in that it can reduce the noise level by about 10 dB to avoid excessive noise affecting the conversation process. At the same time, we can also enjoy music without having to increase the volume of headphones or sleep better when traveling on trains, the aircraft has too much noise.

What is a microphone against noise, how does it work? Picture 5 What is a microphone against noise, how does it work? Picture 5

In general, the actual experience shows that noise-canceling microphones often produce a single sound and sound more clearly, but the volume is somewhat small and in some cases, the sound of the bass will not be equal to the normal microphone. .

So, with the above analysis, surely you understand the microphone against noise and its use, right? If you own a smartphone with noise-canceling microphone, please clean the inside of the hole, prevent dirt to achieve better noise reduction effect. Hope the article has brought you useful information for you.

Having fun.

See more: