Fix Microphone Noise Background on Ubuntu

Solution

• Add below script to /etc/pulse/default.pa

    1load-module module-echo-cancel source_name=noechosource sink_name=noechosink
2set-default-source noechosource
3set-default-sink noechosink
  

the noechosource and noechosink are just name, you can rename it to whatever you want

• Reload pulseAudio by pulseaudio -k
• Choose new device in settings of pulseAudio

Ref

• https://askubuntu.com/questions/18958/realtime-noise-removal-with-pulseaudio
• https://www.youtube.com/watch?v=UNhJCD9H8Uw