Vibration is vibration. A sound wave is a pressure wave in air — frequency, amplitude, waveform — and it doesn't care who made it. A human throat and a speaker cone produce the same kind of energy, and your eardrum receives it the same way. There's no special human vibration. There's just vibration.
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And here's the part that matters most: no two voices are ever exactly the same. No two human voices match, and no two AI voices match either. Every voice — human or machine — is unique. That uniqueness is real, and it's powerful, but it doesn't change the physics. The wave is the wave.
For most people, the human ear can't tell the difference between a human voice and an AI voice. Blind tests put untrained listeners right around chance. The best voice clones today are statistically indistinguishable from real people. Three seconds of audio is enough to clone a voice now, and some listeners even rate the AI versions higher on trustworthiness and persuasiveness.
Trained listeners — audio engineers, people who spend their lives in the details — can sometimes catch artifacts. Spectral smearing, unnatural formant transitions, tiny inconsistencies in the waveform. But that's training, not the ear itself. And even that edge is shrinking fast.