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These computer voices sound human enough to mislead, but one layer of speech still breaks the illusion

We are surrounded by computer-generated voices these days, from navigation systems and voice assistants to automated announcements. But how human do these voices actually sound? A recent study by the Max Planck Institute for Empirical Aesthetics (MPIEA) in Frankfurt am Main, Germany, published in the journal Speech Communication, shows that our perception is affected by three things: how something is said, what is being said, and whether we understand the language.

In two consecutive experiments, the researchers investigated how people perceive the difference between real and synthetic voices. They created 16 short German sentences, such as: “The boy gave his father a hat.” The team then manipulated the sentences in three different ways by changing the word order, replacing words with similar-sounding pseudowords, and combining both changes. This resulted in four versions of each sentence. All versions were recorded by eight human speakers and eight computer-generated text-to-speech (TTS) voices.

In the first experiment, 40 German-speaking participants rated how human the voices sounded. Overall, the computer-generated voices were perceived as less human than the human voices. An analysis of the voices’ acoustic characteristics revealed objectively measurable differences in sound between human and TTS-generated voices.

Helix-02 humanoid robot handles full 8-hour factory work shifts

Figure AI says its humanoid robots can now run full eight-hour shifts autonomously using its Helix-02 AI system, marking one of the company’s strongest claims yet around human-scale robotic labor in real-world environments.

In a post on X, the California-based robotics startup wrote: “Watch a team of humanoid robots running a full 8-hr shift at human performance levels. This is fully autonomous running Helix-02.”

Immunosenescence and Inflammaging as Drivers of Neurodegeneration: Cellular Mechanisms, Neuroimmune Crosstalk, and Therapeutic Implications

Aging is accompanied by profound alterations in immune function, termed immunosenescence, and by a chronic, low-grade inflammatory state known as inflammaging. These processes are increasingly recognized as central drivers of age-related neurodegenerative diseases, including Alzheimer’s Disease, Parkinson’s Disease, Amyotrophic Lateral Sclerosis and Multiple Sclerosis. In the central nervous system, senescent microglia and astrocytes lose their homeostatic and neuroprotective functions, while systemic immune aging and blood–brain barrier dysfunction further amplify neuroinflammation and impair protein aggregate clearance. This sustained pro-inflammatory environment promotes synaptic dysfunction, neuronal loss and cognitive decline.

Engineered brain ‘bypass’ that rewires specific circuits could boost resilience to stress

Broken or disrupted circuits in the brain contribute to many neurological disorders. A new custom-built biological “wire” developed at Duke University School of Medicine points the way toward a new treatment approach—bypassing broken brain connections, rather than relying on long-term medication or external stimulation.

Researchers led by Kafui Dzirasa, MD, Ph.D., have developed a technology called LinCx that allows scientists to create new electrical connections between carefully chosen neurons. Unlike existing tools that often influence many cells at once, this approach enables selective, long-lasting changes in how defined brain circuits function. The study is published in Nature.

“By introducing a way to plug in new electrical connections with cellular-level precision, our study marks a major step forward in the ability to edit brain circuitry and understand how neural networks give rise to behavior,” said Dzirasa, the A. Eugene and Marie Washington Presidential Distinguished Professor of Psychiatry & Behavioral Sciences, Behavioral Medicine & Neurosciences.

Targeting systemic and tumor metabolic balances with ketogenic diets enhance efficacy of therapy in FLT3-ITD acute myeloid leukemia

Goupille et al. describe an alternative approach targeting the host and tumoral primary metabolism in FLT3-mutant leukemia. Ketogenic diet strategies aiming to imbalance lipid homeostasis augment fatty acid and amino acid degradative activity, attenuating FLT3 signaling activation, cell proliferation, and leukemia progression upon targeted therapies.

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