Using AFE and DCM05 inside of earbuds

leinho

Other Parts Discussed in Thread: AFE4403

Hi. I have to develop wireless earbuds with temperature and pulse sensors. In order to get the heart rate, I am planning to follow a reflective PPG approach. I might be interested in using an AFE4403 and probably a DCM05... The problem is that I would like to fit both sensors inside of an earbud and those earbuds have to be custom molded; so, the pcb will be surrounded by silicone. I am thinking of placing the DCM05 in front of the Cavum Conchae so the earbud should be comfortable for sleeping with and not protrude out of the ear.

Does this sound feasible to you with these ics/sensors? Will the silicone affect the measurements? Will the Cavum Conchae be a good place to get the PPG?

Would you recommend me a smaller solution? It would be great if the interface would be i2c by the way. Just to reduce the number of wires coming out of the earbuds.

Thanks!

over 10 years ago

0 Amy Schnoor over 10 years ago

TI__Mastermind 18285 points

Leo,

We have received your post and hope to respond back to you soon.

0 leinho over 10 years ago in reply to Amy Schnoor

Expert 1230 points

Hi Amy,

Did you look into this?

Thanks.

0 Amy Schnoor over 10 years ago in reply to leinho

TI__Mastermind 18285 points

Leinho,

Are you planning to have only the sensor in the ear and everything else just outside the ear. We are researching the possibility of doing this so unfortunately we do not know if you can get PPG from the Cavum Conchae or if the silicone will affect the measurement.

One other question... The DCM05 sensor is a larger sensor compared to others on the market so switching sensors might help you with size. In our FAQ we have some that we have recommended.

e2e.ti.com/.../369445

0 leinho over 10 years ago in reply to Amy Schnoor

Expert 1230 points

Hi Amy,

I could only have the sensor in the ear. That's one possibility. I will be able to have another piece of electronics around the neck but I would like to add as much as I can into the earbuds. At least, for the first prototype I could have only the sensor in the earbuds.

Why don't you know if I can get the PPG? Which would be the challenges? Is this your last statement on this?

The FAQ is really helpful. Thanks for that.

Don't you have a smaller AFE? Do you have another AFE in which I could connect an IR TEMP sensor to it? It would be great to have both sensors on the ears and just an AFE with I2C or SPI communication to the outside.

Thanks.

0 Amy Schnoor over 10 years ago in reply to leinho

TI__Mastermind 18285 points

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Using AFE and DCM05 inside of earbuds