internal built in-microphone
the internal built in microphone has suddenly stopped working even though it was working perfectly fine earlier. Wondering if anyone knows what to do? It's a 2014 MacBook Air.
MacBook Air 13", macOS 10.15
Make sure Internal Microphone is selected in System Preferences > Sound > Input.
If you're not seeing any activity in the internal microphone's Input level meter, an NVRAM Reset is in order: Reset NVRAM or PRAM on your Mac - Apple Support.