What does squealing mean?
squealing
Definition
Of a microphone or a speaker: making a loud, high, piercing noise because it picks up its own sound.
Example sentences
The microphone started squealing the second the principal stepped in front of the speaker.
The microphone started squealing the second the principal stepped in front of the speaker.
Turn the speaker down a bit — it's squealing again and my ears are ringing.
Turn the speaker down a bit — it's squealing again and my ears are ringing.