noun
audio feedback; howling
Refers to the loud, often high-pitched squealing or howling sound produced when a microphone picks up sound from its own speaker, creating a feedback loop.
マイクをスピーカーに近づけるとハウリングが起きる。
When you bring the microphone close to the speaker, audio feedback occurs.
Borrowed from English 'howling', referring to the howl-like sound of audio feedback.