Is there a microphone that works with Mindstorms EV3?
Sadly, there isn't much info yet.

Current options for audio are:


USB Sound Card
BlueZ 4/Pulseaudio 4 (BlueZ 5/Pulseaudio 5 supports
A2DP only)


The number of devices that have been tested and documented is extremely limited, but at least one has been confirmed to work. The non-bluetooth solutions that have been tested successfully are the following. 

Tested and confirmed adapter chipsets:


C-Media Electronics chipsets (Example)


Tested and confirmed microphones:


Logitech C170 webcam built-in microphone


More info in this github issue for ev3dev