That is not a second microphone, it is obviously a barometric pressure sensor from Bosch Sensortec
Take look at the position of the pressure sensor:
http://www.eetimes.com/author.asp?sectio...
Take a look, here is the pressure sensor
http://www.techinsights.com/teardown.com...
There is the Barometer below the SanDisk NAND Flash. Looks like a BMP from Bosch Sensortec
That is not a second microphone, it is obviously a barometric pressure sensor from Bosch Sensortec
Take look at the position of the pressure sensor:
http://www.eetimes.com/author.asp?sectio...
Take a look, here is the pressure sensor
http://www.techinsights.com/teardown.com...
There is the Barometer below the SanDisk NAND Flash. Looks like a BMP from Bosch Sensortec
There is the Barometer below the SanDisk NAND Flash. Looks like a BMP from Bosch Sensortec