1:40
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Refrigerator running, contact mic (4 of 4).
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1:33
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Refrigerator running, contact mic (3 of 4).
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3:28
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Refrigerator running, contact mic (2 of 4).
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2:30
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Refrigerator running, contact mic (1 of 4).
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4:07
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Air compressor motor running, contact mic (2 of 2).
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2:33
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Air compressor motor running, contact mic (1 of 2).
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0:53
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Player piano mechanism, pedals pumping - steady pumping with squeaks.
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1:09
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Early gasoline engine, Stovers - urgent chugging, water pump.
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0:37
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Vacuum pump - deep vibration, guttural pulsing.
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0:27
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IV pump running - steady stutter and whir.
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0:19
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Blowing a balloon up - multiple puffs, then release.
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0:05
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Plastic pump toy - airy squeaking. (4)
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0:04
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Plastic pump toy - airy squeaking. (3)
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0:09
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Plastic pump toy - airy squeaking. (2)
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0:05
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Plastic pump toy - airy squeaking. (1)
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0:05
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Bicycle pump operation - moderate pumps. (7)
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0:09
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Bicycle pump operation - slow pumps.
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0:03
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Bicycle pump operation - moderate pumps. (6)
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0:05
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Bicycle pump operation - moderate pumps. (5)
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0:03
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Bicycle pump operation - moderate pumps. (4)
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