Bob, Most good audio equipment produce sounds up to 20k. You would need a custom amp and speakers.
Joel Sent from my iPad On Jul 8, 2013, at 8:53 PM, Bob Moriarty <bobmo...@gmail.com> wrote: Professor Dreuge & Any Audio Engineers, Some of the abstracts in your link mention 23 kHz as a sort of sweet spot for barnacle repulsion. The spec sheets on the sound exciters all specify an audio range with the upper limit at 20 kHz - which is the upper limit of audio perception by humans. I'm an audio newb with a tin ear. Is it likely the sound exciters - or most any speaker for that matter - could produce output at 23 kHz? Would it be simple to create a CD with a 23 kHz sound track that could be played through a boat's sound system (to sound exciters attached to the inside of the hull)? I have more dumb questions for later. Bob M Ox 33-1 Jax, FL On Mon, Jul 8, 2013 at 11:09 AM, <dre...@gmail.com> wrote: > Bob, > > Have a look at the article I found online regarding "Inhibition of > barnacle cyprid settlement using low frequency and intensity ultrasound." > > http://www.ncbi.nlm.nih.gov/pubmed/22296259 > > > Ted, > > Also a big thanks. I just installed a stereo in my cabin, and while I > wanted speakers in my cockpit, I was very reluctant to cut speakers holes. > > > - > Paul E. > 1979 C&C 29 Mk1 > S/V Johanna Rose > Carrabelle, FL > > On Jul 4, 2013, at 12:00 PM, cnc-list-requ...@cnc-list.com wrote: > > Date: Wed, 3 Jul 2013 22:39:53 -0400 > From: Bob Moriarty <bobmo...@gmail.com> > > To: cnc-list@cnc-list.com > Subject: Re: Stus-List Music in cockpit > Message-ID: > <cam7ccy+hxy1eumfmhej+u9tyh3sstzcq_ry5oazvdp_opjp...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > > Ted, > That is really cool and interesting. Thanks for posting the youtube and the > details. > I wonder if there's any sort of rock'n'roll or other music that barnacles > and slime find repulsive. > I say that mostly in jest, remembering the "magic ultrasound barnacle > repeller system" from years back. > Not trying to change the subject. I'm going to give your discovery a try. > Bob M > Ox 33-1 > Jax, FL > > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
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