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Scientific study reveals people can actually sound tired
Researchers say exertion changes pitch, intensity and pauses, and the findings could help improve speech-recognition systems.
- On Thursday, University of Texas at Dallas researcher Zahra Omidi presented findings at the 190th Meeting of the Acoustical Society of America, detailing how physical exertion alters human voice patterns including pitch and timing.
- Physical exertion forces the respiratory and vocal systems to compete for the same hardware, Omidi explained, causing the body to prioritize oxygen and making speech slower and more segmented.
- "Pitch and intensity both increase, while intensity also becomes less stable," Omidi said, as speakers adopt longer and more frequent pauses to allocate time for necessary breathing.
- Standard speech recognition often fails during physical activity because speech deviates from neutral linguistic norms, impacting military operations, aviation, and emergency response systems.
- Omidi noted that vocal changes may operate below perceptual awareness yet still induce measurable physiological differences, suggesting technology could be trained to interpret stressed speech more accurately.
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Leaning Left7Leaning Right6Center11Last UpdatedBias Distribution46% Center
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L 29%
C 46%
R 25%
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