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AI voice tech is now so good you almost certainly won’t be able to distinguish between real and deepfake voices – here’s what you need to know

Efosa Udinmwen

29 September 2025

The cost of creating realistic voice deepfakes is now shockingly low

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(Image credit: Shutterstock/Koshiro K)

AI-generated voices now mimic humans so convincingly that detection is nearly impossible
Creating a convincing voice clone now takes minutes and minimal expertise
Some synthetic voices were actually rated more trustworthy than real human recordings

For years, many people assumed that AI-generated speech could always be identified by its slightly “fake” qualities.

New research from Queen Mary University of London challenges this assumption, showing current AI voice technology has reached a level where “voice clones” and deepfakes are nearly indistinguishable from real recordings.
In the study, participants compared human voices with two forms of synthetic audio: cloned voices designed to imitate real speakers and voices generated from an LLM system without specific counterparts.

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Beyond realism and into dominance
Listeners frequently struggled to distinguish between the two, suggesting the technology has entered a phase where human-like realism is no longer an aspiration, but a reality.

The research team investigated not only whether participants could distinguish between synthetic and real voices, but also how they perceived them.
Surprisingly, both types of AI-generated voices were evaluated as more dominant than human ones, and in some cases, they were judged more trustworthy.
Dr. Nadine Lavan, Senior Lecturer in Psychology at Queen Mary University of London, stressed how easily and cheaply her team created these voice clones.

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“AI-generated voices are all around us now, it was only a matter of time until AI technology began to produce naturalistic, human-sounding speech, the process required minimal expertise, only a few minutes of voice recordings, and almost no money,” she said.
She said that the ease of use shows how far the technology has advanced in a short time.
Such accessibility creates opportunities in fields such as education, communication, and accessibility, where bespoke synthetic voices could enhance engagement and reach.

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Just as AI writers raise questions about originality, copyright, and misuse, AI voice generation prompts debates over ownership of identity and consent.
If realistic audio can be created from just a short sample, the risks of unauthorized cloning become difficult to ignore.
As AI tools continue to expand in capability and accessibility, the challenge will be ensuring that benefits are realized without opening new avenues for deception.
Understanding how people respond to these voices is only the first step in addressing the ethical, legal, and social implications of a technology that is no longer futuristic, but firmly present.
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Efosa Udinmwen

Freelance Journalist

Efosa has been writing about technology for over 7 years, initially driven by curiosity but now fueled by a strong passion for the field. He holds both a Master’s and a PhD in sciences, which provided him with a solid foundation in analytical thinking. Efosa developed a keen interest in technology policy, specifically exploring the intersection of privacy, security, and politics. His research delves into how technological advancements influence regulatory frameworks and societal norms, particularly concerning data protection and cybersecurity. Upon joining TechRadar Pro, in addition to privacy and technology policy, he is also focused on B2B security products. Efosa can be contacted at this email: udinmwenefosa@gmail.com

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