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Old March 13th 07, 11:42 PM posted to rec.radio.amateur.homebrew,sci.electronics.design
Rich Grise Rich Grise is offline
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First recorded activity by RadioBanter: Sep 2006
Posts: 48
Default Detecting Ultrasound

On Tue, 13 Mar 2007 18:40:06 +0000, Michael A. Terrell wrote:
clifto wrote:
Michael A. Terrell wrote:
clifto wrote:
John Smith I wrote:
Scott wrote:
clifto wrote:
Stace MacGuyver wrote:
Suspend a thin shaving razor blade between two pieces of dental floss
and put
your ear close to the blade. Watch the razor vibrate.



I don't know how your sense organs are arranged, but I know that if I
dangle something next to my ear, it's terribly hard to watch it
simultaneously. ;-)



That's pretty cool, MacGuyver. Does the razor blade do anything?

It cuts off your ear if you get too close

Be better if you could use it as an electric razor ...

Replace the dental floss with Litz wire and attach ends to 110 VAC.

Wait. Maybe not. Considering how many stations you can pick up with a
razor-blade radio, that would probably interfere with vital communications
all throughout the spectrum. What's the resonant frequency of a whisker?

They don't make the blue blades anymore.


Do they make any other kind of thin shaving razor blades?


Yes, but the blueing was what made a detector.


What does that have to do with dangling the blade from dental floss? Or,
for that matter, what does dangling a blade from dental floss even DO?

Thanks,
RIch