> A closer examination of one recording reveals it’s not just a single sound. Roughly 20 or more different frequencies, or pitches, are embedded in it, the AP discovered using a spectrum analyzer, which measures a signal’s frequency and amplitude.
Did anyone try decoding it? GMSK, FSK, BPSK, ASK?
AP filtered—sorry, "enhanced"—it to remove background noise before posting it to Youtube, where it's encoded with lossy compression. So if there was any signal embedded in it, there's a decent chance it's been obliterated.
Sure. What a bad coincidence. But let's trust them, as it might be a weapon of mass destruction /s