High-frequency squeak, hum:
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Pounding in the mud
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Parachute deployment
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Unscrew, twist the cap of the bicycle camera
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Flag flaps in the wind on the seashore
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Small crank rotation
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Closing doors, opening, Passenger elevator
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Air dissection
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Robot heartbeat
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Board falls
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The noise of the refrigerator room
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Noise inside the spaceport
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Bicycle rear wheel ratchet
★★★★★