<html><body><html><head><meta name="viewport" content="width=device-width" /><meta http-equiv="Content-Type" content="text/vnd.ui.insecure+html;charset=utf-8" /></head><body style="overflow-wrap:break-word; word-break: break-word;"><div class="mail_android_message" style="line-height: 1; padding: 0.5em">Yup, that's how fitbit measures heart rate. Photoplethysmography.<br>
<br>
Justin <br>
</div><div class="mail_android_quote" style="line-height: 1; padding: 0.3em">On 08/09/2018, 6:34 PM Scott Gravenhorst <music.maker@gte.net> wrote:<blockquote class="gmail_quote" style="margin: 0.8ex 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<br />
I'm certainly not an expert, but I believe those clip on oxygen saturation monitors<br />
use an LED and sensor and I think they also measure pulse.<br />
<br />
Busby Bergson <busby.bergson@gmail.com> wrote:<br />
>Hi all -<br />
><br />
>Sorry for the question, it's not exactly "synthesizers" - but a friend<br />
>of mine would like to amplify the sound of his pulse, from the wrist.<br />
>Contact mics wouldn't cut it. I thought people here might have<br />
>considered some interesting approaches to this concern.<br />
><br />
>Thanks,<br />
>BB<br />
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<br />
-- ScottG<br />
________________________________________________________________________<br />
-- Scott Gravenhorst<br />
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-- When the going gets tough, the tough use the command line.<br />
-- Matt 21:22<br />
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