Sort of sounds like a robot low on batteries trying to beatbox. Sinewave sounds created with SFXR sound effect generator, mixed in Audacity. Seamless stereo loop, no attribution necessary for personal or commercial projects.
機器人Beatbox
聲道：2
類型：ogg
loop、filthy、grungy、synth、dirty、rusty、beat、bass、short、growl、crunch
循環、污穢、蹩腳的、合成器、臟、生疏、擊敗、低音、短、吠聲、緊縮
資料來源：freesound ( https://freesound.org )