Hissing old tv:
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Faulty air conditioning, vibration noise
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Sound to start presentation
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Air conditioning (outdoor unit)
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Email message sound
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An electric toothbrush
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Windows notification sound
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Humming fan, Computer turning on, off
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SMS notification sound
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Hard disk, read, spin
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Popcorn machine
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Clothes dryer
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Whatsapp notification sound
★★★★★