Hi Walt,
Sounds interesting! How do you record frogs with your
hydrophone?
Tony Celis
--- Walter Knapp <> escribi=F3:
> Posted by: "Bruce Wilson"
>
> > Anyone know Gordon Hempton? He's got one where he
> has a recording of an
> > underground river, and I'm curious how you get
> that without a drilling rig.
>
> A geophone, or a hydrophone can do that without
> drilling. Sound carries
> well underground. Just bury your hydrophone with a
> shovel to dig a small
> hole. Or even just drop it in a small pool of water
> and it will pick up
> the surrounding soil sounds. I have problems when
> recording frogs with
> my hydrophone of noise pollution from nearby wells
> and such like.
>
> Or Gordon could have done it in a cave with a
> regular mic, though I
> don't know that recording to know.
>
> Walt
>
>
Antonio Celis Murillo
Center for Conservation Biology
University of California Riverside
208 University Laboratory Building
Riverside, CA 92521-0334
(951) 827-5484
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