Robot heartbeat:
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Ventilation inside, The noise of the room
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Passenger elevator, closing doors, opening
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Electronic sounds
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Chemistry, Bunsen Burner
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Squatting the Mat (1.5 seconds)
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Breaking wooden object, Falling
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Opening, closing a cigarette case
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Air dissection
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Tinder brush surface
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Harvesting machine
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Bleeding a bike wheel
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Squatting the Mat (0.5 seconds)
★★★★★