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Sensors in smart devices can detect alcohol intoxication by analyzing voice patterns

Written By : Dr. Kamal Kant Kohli Published On 2023-11-14T19:30:04+05:30  |  Updated On 15 Nov 2023 10:32 AM IST
Sensors in smart devices can detect alcohol intoxication by analyzing voice patterns
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Canada: A small, controlled laboratory study revealed the usefulness of voice spectrographic signatures collected from brief recorded English segments in identifying alcohol intoxication.

Researchers at Stanford Medicine and the University of Toronto conducted a small study of 18 adults ages 21 and up. Participants were given a weight-based dose of alcohol and randomly assigned a series of tongue twisters—one before drinking, and one each hour up to seven hours after drinking.

"Sensors in smartphones and smart speakers could help determine a person’s level of alcohol intoxication based on the changes in their voice," the researchers reported in the Journal of Studies on Alcohol and Drugs.

The participants were asked to read the tongue twister aloud, and a smartphone was placed on a table within 1 to 2 feet to record their voices. Researchers also measured their breath alcohol concentration at the beginning of the study and every 30 minutes for up to seven hours. They used digital programs to isolate the speaker’s voices, broke them into one-second increments, and analyzed measures such as frequency and pitch.

When checked against breath alcohol results, changes in the participants’ voice patterns as the experiment went on predicted alcohol intoxication with 98% accuracy.

“The accuracy of our model genuinely took me by surprise,” says lead researcher Brian Suffoletto, M.D., associate professor of emergency medicine at Stanford. “While we aren’t pioneers in highlighting the changes in speech characteristics during alcohol intoxication, I firmly believe our superior accuracy stems from our application of cutting-edge advancements in signal processing, acoustic analysis, and machine learning.”

Dr. Suffoletto says the goal of such analysis is to deliver “just-in-time interventions” to prevent injury and death resulting from motor vehicle or other accidents. The best intervention tool would be easy to use and readily available—and the near-ubiquitous nature of smartphones and smart speakers make them an obvious tool for helping alert people that they’ve become intoxicated.

“While one solution could be to frequently check in with someone to gauge their alcohol consumption, doing so could backfire by being annoying (at best) or by prompting drinking (at worst,” he says. “So, imagine if we had a tool capable of passively sampling data from an individual as they went about their daily routines and surveil for changes that could indicate a drinking episode to know when they need help.”

Dr. Suffoletto predicts that surveillance tools may eventually combine several sensors—for example, gait, voice, and texting behavior.

“One primary reason is statistical: integrating test with varying sensitivities and specificities can elevate overall performance,” he says. “Additionally, we cannot always depend on users to provide continuous data inputs. An individual might not speak for hours, but they could be walking. There might be instances where they’re stationary at a bar, neither walking nor talking, yet actively texting.”

Dr. Suffoletto says much larger studies need to be done, on people with a wide variety of ethnic backgrounds, to confirm the validity of voice patterns as an indicator of intoxication. He points out that it may also be helpful to build relationships with companies that are already collecting speech samples through smart speakers. And he sees this research as a call to action, urging the National Institutes of Health to develop data repositories for these types of digital biomarkers.

The ultimate goal is to develop an intervention system that people are willing to use and can help prevent injuries and save lives.

“Timing is paramount when targeting the optimal moment for receptivity and the relevance of real-time support,” he says. “For instance, as someone initiates drinking, a reminder of their consumption limits can be impactful. However, once they’re significantly intoxicated, the efficacy of such interventions diminishes.”

Reference:

Suffoletto B, Anwar A, Glaister S, Sejdic E. Detection of Alcohol Intoxication Using Voice Features: A Controlled Laboratory Study. J Stud Alcohol Drugs. 2023 Nov;84(6):808-813. doi: 10.15288/jsad.22-00375. Epub 2023 Jun 9. PMID: 37306378.

Journal of Studies on Alcohol and Drugsalcohol intoxicationsmartphones
Source : Journal of Studies on Alcohol and Drugs
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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