Pink noise:
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Energy buildup, Electronic signal
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High frequency pulsating electronic signal
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Geiger counter
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High frequency squeak
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SOS signal transmission, Morse code
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Radar, location alert
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Transfer, reception, Morse code
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High-frequency squeak, Low-frequency rumble
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SOS signal reception, Morse code
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Morse code transmission
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Radio Setup
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Brown noise
★★★★★