File:Unknown 00p012-2.bmp
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Unknown_00p012-2.bmp (424 × 571 pixels, file size: 709 KB, MIME type: image/x-bmp)
Another spectrogram of unknown VLFVery Low Frequency (3-30 kHz) signal at ~12.5 KHzKiloHertz (kHz) 10^3 Hz. While recording audio, randomly every 10-30 minutes but without fail, the lines capture 2-3 ~12.5 KHzKiloHertz (kHz) 10^3 Hz tones, separated by approximately a second. In this image AC Hum @60Hz and its harmonics are easily identifiable.
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Date/Time | Dimensions | User | Comment | |
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current | 22:41, 11 January 2017 | 424 × 571 (709 KB) | Pigbaby (Talk | contribs) | Another spectrogram of unknown VLF signal at ~12.5 KHz. While recording audio, randomly every 10-30 minutes but without fail, the lines capture 2-3 ~12.5 KHz tones, separated by approximately a second. In this image AC Hum @60Hz and its harmonics are... |
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