I call this 'lunar wind' becuase its an affected sample that i think sounds like a unearthly wind. I recorded a real life wind and processed the signal with some heavy eq and compression. The sound is 100% continuous recording.
Hum machinery power synthetic machine sci-filoopable sound generated and modified in adobe audition. I wanted it to sound like a space ship hum or exotic power station.
Completely synthetic heartbeat at approximately 60bpm. Note: very low bass, you probably won't hear this on a laptop/tablet. . . It only works on headphones or through a set of real speakers.