Microphone selection and sensitivity during phone calls, how does it work?

asked 2014-05-06 12:34:15 +0300

barral gravatar image

From time to time it happens that my interlocutor cannot hear me loud and clear enough, and even when I think I move very close to the bottom of the phone, it seems to help only very little.

As far as I have understood from other threads and from doing the CSD test, Jolla actually has one (or two?) mics at the bottom of the unit with good quality, and that there is one mic at the top of the unit with some lower audio quality.

When doing a phone call, I would expect that the bottom mics are selected. But is this always the case? And is the sensitivity always the same?

What is the use of the mic at the top of the unit? Is it also utilized during phone calls?

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Top mic is used for noise cancellation, basically it should somehow compute the differences between bottom and top mic inputs and filter out the surroundings noises so that other side hears you clearly.

mezmerize ( 2014-05-06 12:45:11 +0300 )edit

this sounds familiar to me ...

stephan ( 2014-05-06 13:53:11 +0300 )edit

The other side did not heard me loud enough in the last few days. Mics seem to be clear. Only phone restart solved this problem.

cocovina ( 2014-10-15 15:35:04 +0300 )edit