godan verb (-ru), intransitive verb
produce audio feedback; howl
Colloquial verb derived from ハウリング (howling), used for the squealing or ringing sound when a microphone picks up its own output from a speaker.
See also: ハウリング
マイクがハウって、会議が中断した。
The microphone produced feedback and the meeting was interrupted.
スピーカーの近くに立つとハウりやすい。
It tends to howl if you stand near the speaker.