Phonetic and linguistic analysis can be used to analyze component parts of voice such as pitch, how vowels and consonants are pronounced, voice quality and even vocabulary. If the forensic investigator is lucky, they will be able to identify certain voice features, pathological features that are difficult to disguise, such as pronouncing 'r's as 'w's, said Foukles. One issue of concern is the use of software to analyze the acoustic properties in someone's voice to determine their state of mind, including if they are lying. Foukles said such "lie detectors" or "voice stress analyzers" are based on "questionable principles" but are now being used for security purposes. "Moscow airport is using this as a way of detecting whether someone is a terrorist threat or not," said Foukles. "I think that is a very worrying development." Related Links: |
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