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Breathalyzer headphones

27.08.2021

Scientists at Tokyo Medical and Dental University have modified a pair of commercial headphones to collect gas from the skin of a person's ears and created a portable breathalyzer.

Through the ears of a person, alcohol vapors are released in the same way as when breathing. The earpieces are attached to an ethanol vapor sensor called a "bio-sniffer". The sensor lights up if it detects ethanol fumes. The brighter the light, the greater the concentration of alcohol in a person's blood.

The use of the ears is good because they have relatively few sweat glands. It is also possible that compounds such as ethanol in the middle ear are released through the membrane into the outer ear canal.

Changes in the concentration of ethanol emitted through the ears and breath of the volunteers were fairly constant. However, the ethanol readings in the headphones peaked about 13 minutes later than the breathalyzer.

These results led the researchers to suggest that the ears are a good non-invasive way to measure blood alcohol concentration.

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South China Normal University (SCNU) announced the progress in the development of color reflective displays with the ability to show video. Back in 2012, a group for the development of "paper" displays was created as part of the university, led by former Philips engineers. Later, the team began working with a local company, Shenzhen Guohua Optoelectronics Ltd, which is likely to commercialize the development.

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Liquavista went out of business in 2013. China picked up the banner that fell from its hands and now promises to release a commercial product in 2021. These can be portable devices for reading and watching videos that can work for weeks on autonomous power, like regular e-readers on E Ink. But unlike book readers, video on them is played at a high frame rate.

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