While trying to get my microphone to work, it was having this unusual feed back buzzing pulsing sounds. Along with a strange noise. (This wasn't my voice, and the file hasn't been edited.) "who's there?" and the "hello's" are of course me, trying to get the microphone to work. I decided to record it after I felt it was strange. The sound is of course free to use for whatever you desire, credit if you want and leave a comment below to be nice. :)
奇怪的反饋聲
聲道：2
類型：flac
Sci-fi、Buzzing、Weird、Outer-Space、Strange、Unusual、Alien、Paranormal、Testing、Alien-Species、Feedback、Microphone、Crazy
科幻、嗡嗡、奇怪的、外太空、奇怪、異常、外僑、超自然、測試、外來物種、反饋、麥克風、瘋
資料來源：freesound ( https://freesound.org )