Clock tower, bell ringing, 1/2 hour:
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Landing Area, Outdoor Airport
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Birds, voices of, Park near the school
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City, construction site, general noise
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General noise, City parking
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Traffic, police signal, City
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High traffic on highways
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3/4 hours, Clock tower, ringing a bell
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City, traffic
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Birds, sounds of the environment, Park
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Outdoor Airport
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City, twittering, pedestrians, general noise
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Airport, x-ray control
★★★★★