POET Technologies Inc.

This ‘smart’ hairbrush has a built-in microphone and a gyroscope
5 Jan 2017, by Catey Hill for marketwatch.com


“Kerastase Hair Coach powered by Withings”

It has a microphone that listens to the sound of your brushing; an accelerometer to measure how fast the brush is moving through the hair; electrical signals to measure how much force you’re applying to your hair; sensors to determine whether you’re brushing wet or dry hair; and a gyroscope — a device used in everything from the Hubble telescope to airplanes — which detects how the brush is tilted.

The brush collects data from each of these elements and feeds it through Wi-Fi or Bluetooth to a mobile app — which also factors in humidity levels, wind and weather — to help consumers brush hair more effectively. It will provide data on hair frizziness, dryness, split ends, breakage and manageability and information on how to deal with those issues.
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For Kerastase and Withings, the new techy tool is a way to further tap into the $83.1 billion hair-care market — one that is projected, by 2021, to balloon to $94.5 billion, according to data from Statista. What’s more, the app connected to the brush will recommend Kerastase products to users, offering further revenue streams to the companies.

and

“Kerastase Hair Coach powered by Withings” won’t be available for purchase for a few months and will sell for “under $200,” though the exact price has not yet been disclosed.
 
http://www.marketwatch.com/story/this-smart-hairbrush-has-a-built-in-microphone-and-a-gyroscope-2017-01-05

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