Pounding in the mud:
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Beats fastening, The flag flaps in the wind
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The metal gates of the grill open, close
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Chemistry, Bunsen Burner
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Room noise
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Flag flaps in the wind on the seashore
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Noise inside the spaceport
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Opening, closing doors,, Freight elevator
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Noise
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Bicycle rear wheel ratchet
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Sine wave (975Hz)
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Item thrown in the mud
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Tent Camping
★★★★★