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Headphones for heart rate monitor

04.11.2013

Kaiteki Institute and Bifrostec have developed a heart rate measurement technology that uses headphones as a sensor. The development was demonstrated at the Healthcare Device Exhibition 2013 in Yokohama.

The demo used simple consumer electronics headphones that cost less than ten dollars.

To eliminate interference, Kaiteki Institute and Bifrostec engineers developed digital signal processing technology
The development is based on the change in pressure in the closed space of the auditory canal, closed by the earpiece. The change is caused by the fact that the tympanic membrane oscillates in time with the pulsations of the arteries. The earpiece, acting like a microphone, picks up these pressure changes.

It is noteworthy that nothing needs to be changed in the headphones, so that they can perform their main function, measuring the pulse from time to time, for example, when the user listens to music while jogging.

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