Recording of a vintage room fan (bond air recirculator). Bass is boosted and the sound is reversed. Very relaxing, noise masking, sleep-inducing sound especially good for those people with tinnitus.
Super retro tape deck sound effect from a cassette player in a car. It has the click and reel sound effect, like you just popped a tape in and its starting.
Sound output from playback of an old blank/empty type 1 audio tape that has an undulating pattern of noise. The volume hasn't been adjusted, so this is true to the amount of noise present in a tape recording.