This question already has an answer here:
Airpods microphone has very poor quality on my Macbook (input format: 8 Hz, 1 ch 16 bit processed by SCO codec):
As a temporary solution, I use the built-in microphone but I'd like to find out how to fix it on Airpods side.
- MacBook Pro (Retina, Mid 2012)
- macOS Mojave 10.14.4
- AirPods 1