Surely you need a smart phone attached to your face, most have a proximity
detector in them these days that tells when its moved away from the face and
puts it on speaker phone.

Alternatively, there are sheets of material that have one side magnetised,
you could use a hall effect detector chip and invert the output with one
transistor to drive a sounder. Trouble is you would need a lot of magnetic
material glued to your face.
Does anyone remember the Theromone? This used the capacity change by
moving your hands to control an oscillator so that you could make music with
it. Perhaps the same could be done for the face? of course painting your
face with silver conductive paint might be a drawback.
Brian

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"Richard" wrote in message
...
On 30/03/2020 08:25, polygonum_on_google wrote:
A rare story these days - even has a coronavirus element but still made
me laugh.

Astrophysicist gets magnets stuck up nose while inventing coronavirus
device

Australian Dr Daniel Reardon ended up in hospital after inserting magnets
in his nostrils while building a necklace that warns you when you touch
your face
https://www.theguardian.com/australi...navirus-device


Thanks for that.
I doubt there is anyone who will not laugh at this.