How would you do a sleep apnea detector?

[boB]

On Sun, 27 Feb 2005 04:27:19 +0000, Guy Macon
<_see.web.page_@_www.guymacon.com_> wrote:

Getting back to the topic at hand, a low-cost home apne detector
would be a Very Good Thing.

It might at least get the person to go to a sleep lab and have them
properly diagnosed. they're not going to just sell you a machine I
don't think.

boB

 

[JeffM]

detector would be a Very Good Thing
Guy Macon

This is not quite the same thing (you gotta go in to get rigged),
but ambulatory systems have been around for 25 years.
Inductance plethysmograph (~400kHz) determines the cross-sectional area
of your abdomen and thorax.
Deltas are derived with a PLL.
Back then, it was recorded with a Walkman-like recorder,
PWMed and FMed to get 8hr on a C-120.