Why do mobile phones have two microphones? What is the use of the secondary mic?

Maybe you haven't thought about - Why do mobile phones have two microphones? Look at the top of the backside of your smartphone, which is a secondary microphone. It is available in most of the smartphone, except for some very budget smartphones. So, what is the use of a secondary microphone in a smartphone? why not a single microphone is enough? 

Why do we have multiple microphones for a phone? 

Why some smartphones have multiple microphones? Actually, we are going to answer everything related to the secondary mic in smartphones.

functions of Secondary microphone:

• Noise cancellation
• duplexing (Removal of the sound that is occurred form the speaker when you talk to someone on the speaker)

Conclusion:

Actually, it is mainly for noise cancellation, to make the calling voice more clear. As the secondary microphone is placed on the other side from the speaker, it catches, so the sound from the speaker of the phone is not captured clearly in the secondary microphone, so when you call on speaker, the secondary microphone helps to remove the unnecessary sounds generated from the speaker.

So, this was all about - why some smartphones, have two microphones.

Stay tuned for this type of information related to smartphones.

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• Why do mobile phones have two microphones? What is the use of the secondary mic?