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Sound design - choppers passing by.
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0:16
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Helicopter moving in from a distance from left to right, with a throb.
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0:22
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Helicopter moving in from a distance with a choppy hovering.
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0:42
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Helicopter drone moving in from a distance with a hover, and faint insects in the background.
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0:17
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Helicopter drone moving in from a distance with a hover, and faint insects in the background.
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