The approach has been tested a number of times to "laser-read" the
sound from a guitar. They got too much self-noise, I think, cause of
some inevitable laser -parameter.
At 16:22 2006-10-10, you wrote:
>Syd Curtis wrote:
> > ... New Scientist magazine Issue of 30 Sept 2006, p 29:
> > "California inventor David Schwartz has filed a patent (US
> > on a hyper-sensitive microphone. Instead of using sound waves to force=
> > heavy diaphragm to move, it fires a laser beam through a volume of mois=
> > air. Incoming sound waves make water droplets in the air vibrate, whic=
> > modifies the laser beam's strength in sync with the sound - in other wo=
> > making it act as a microphone."
>Water droplets? That implies saturated air. And the odd passing cosmic
>ray might be able to induce the formation of water droplets for you ...
>sounds like a cloud chamber to me, but then I never bothered to listen
>to a cloud chamber.
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Yahoo! Groups Links
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01