Is AI voice technology becoming indistinguishable from human speech?

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Advancements in synthetic speech technology have led to AI-produced voices that are nearly indistinguishable from natural human speech, creating challenges in discerning their origin.
A collaborative study between Tianjin University and the Chinese University of Hong Kong explored how well participants could differentiate between human and AI-generated speech, revealing little improvement even after brief training sessions.
Though listeners showed little behavioral change in distinguishing AI from human speech, brain mapping using EEG indicated that the auditory brain detected subtle differences over time intervals following stimulus presentation.
Synthetic speech differs slightly from human speech in modulation spectra, but these nuances are often imperceptible at a conscious level, though they may be detectable by the auditory brain.
The research suggests that with more extensive training and exposure, individuals might enhance their ability to detect synthetic speech, offering potential for developing better detection tools to mitigate risks such as voice-based impersonation.

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