This is windows wasapi-driver glitch created by mistake. Sound from computer created a loopback to audacity and this was the result. Warning! turn the volume down, this sound is loud! i've not edited the clip in any way.
This is what background noise sounds like when you, first set your recording to automatically reduce noise, except to get this sound, put mic on sensitive, then increase the volume. Voila! computer noise!.
The keyboard sounds weird but i try the best to make it nature. The situation could be browsing facebook or website, which is you interested to click it and leave the message. Recording by miui hm 1w.
I took an rca to 1/8 inch cable and plugged it into my sound card input. The sound is created by sticking the two rca plug ends to a 9 volt battery's + and - terminals. . . I don't know if the noise comes from the battery or the computer, though.