0:29
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Rapid sequence of smooth multi tonal pulses
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0:01
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Quick mid tone spacecraft hover and pass by
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0:51
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Jet helicopter approaches and circles in large circle overhead with good rotor sound, flies away. Vintage ...
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0:13
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Smooth low pitch engine noise from a hovering spacecraft
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0:22
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Musical and buzzing high pitch drones with low glassy overtones
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0:50
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Door being closed then helicopter takes off and hovers
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