Air conditioning (outdoor unit):
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Whatsapp notification sound
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Computer turning on, off, humming fan
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Air conditioning, off, on
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Popcorn machine
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Sound to start presentation
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Spin, read, Hard disk
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A vacuum cleaner
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Windows notification sound
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Android notification sound
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Electric razor
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Defrost process, Spaceship freezer
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Cool sound for notification
★★★★★