Science/Engineering/Technical forums

Hello all. First post, I believe.
What John didn't mention is that immediately after that sailing the weather turned sour. It's been raining ever since, and inconveniently coincided with my boat coming out of the water for paint (and removal of the attached aquatic reserve).

(http://www.patentstorm.us/patents/51430 ... ption.html)
I've been searching for any information on the use of sound generators or attestations by major carriers that these actually keep the barnacles and other pests from attaching to the hull. The power consumption could be reduced if such a device could determine appropriate resonant frequencies, and if it actually worked.
Does anyone have any references I could read?

Rand

Line the bottom of your boat with a copper sheet to transmit the vibration, and you can then use any frequency you wish!

Just saw this:
http://www.physorg.com/news/2011-01-nan ... icity.html

John, did you notice if your stuff is piezo? Wonder what the axes of flex vs electric output would be (I'm still thinking field emission here, but with self-supplied field by shaking the thing perhaps).

Doug
good thought--I was aware that it was piezo but its not one of things on our horizon so easily forgotten in the heat of the moment.

I'll set up a crude test ---I'll post results later
thanks John