On Sat, Jun 21, 2014 at 9:13 PM, Roy <royjhopkins@gmail.com> wrote:

> I have tried searching for information but would like to know if an
> ultrasonic transducer can be used to penetrate ground down to approx 2 to=
 3
> meters deep for locating pipes & cables or as a metal detector.

You want to use infrasonic frequencies, not ultrasonic frequencies for
ground penetrating sonar.

-p.
--=20
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