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!.
I was trying to record noise outside my house with my phone, but when i tried to amplify the noise, this was the result. Thank you to renard_v for pointing out that these are decoding artifacts/compression artifacts. I didn't know it can sound like that when amplified.
Hungry kittens attempting to make vocal noises as food is being prepared against a background mechanical drone. Noise reduction artifact adds to the creepy effect.
This is something i made with audacity's noise generation options, then i added some effects. This could be used for space sounds(it reminds me of farscape)or some kind of horror game/film.
I've scanned the radio frequencies with an old radio and recorded with my tascam dr-05 via the headphone jack. You can hear some weird looping patterns and sound fragments from random radio stations.