When medical ultrasounds are done a clear gel is smeared on the body
to provide continuous fluid contact between the transducer (Mic) and
the body.
Kevin
On Jul 21, 2010, at 6:20 AM, davimon100 wrote:
> Am I right in thinking that hydrophones are waterproof contact
> microphones? If so, it should be possible to hook a contact mic up
> to pick up surface vibrations on an object outside of water, right?
> I tried attaching a Dolphin Ear hydrophone to a vibrating surface
> and was underwhelmed by the result. I'm sure the mic is fine but,
> rather, my technique is flawed: I believe I may not be making a good
> enough contact - I wonder if the air between the hydrophone and the
> solid is muffling the sound. Can any of you share tips on getting an
> optimal contact between a hydrophone and a solid substrate - a tree,
> for example? 'Blu tack', an elastic band to hold it close, gaffer
> tape, conducting jelly, Joe's Sticky Stuff? Thanks.
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