High-frequency squeak, hum:
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Stop, movement, Passenger elevator
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Hammering on construction debris
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Tambourine
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The metal gates of the grill open, close
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The noise of the refrigerator room
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Airport Luggage Transport Belt
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Tinder duster surface
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Board falls
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Throw a small bag, purse on the floor, wallet
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Parachute deployment
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Lab accident
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Throw the item in the trash.
★★★★★