[sdiy] Resonant Cavity Modeller (was Re: [sdiy] transducers)

Wed Nov 10 04:43:40 CET 2004

I expect the patent would have expired by now, and as patents go, this one
would be fairly easy to discredit in a court of law. Patents that are
"obvious to other people at the time" don't stand, and if a 18 year old kid
could come up with the idea at the same time, I dout they'd have any hop of
defending it, let alone the "prior art" argument on that being how a piano
essentially works anyway.

Still, I'm no lawer either. Heck - just hold an electric guitar in front of
a speaker box!

Ken

>In a message dated 11/9/2004 10:28:59 PM Eastern Standard Time, 
>sasami at hotkey.net.au writes:
>
>> >Basically, how feasible would it be to amp a mic signal, use that to drive 
>> a 
>> >very large inducer placed next to a bunch of strings tuned to whatever 
>> >frequencies you want to resonate the most, and have a pickup at the other
>> end of the 
>> >strings?  Re-tunable resonance simulator... I've ben considering building 
>> such 
>> >a device for a while now.
>> 
>> You aren't the first to have the thought. You won't be the last. The idea
>> was patented in the early 80's, which amused me, because I'd thought of the
>> idea prior to that. After all, what the heck is a piano! Hold down the
>> sustain pedal, and that is exactly what you have. I used to use it to
>> resonate the organ which was in the same room.
>
>So it is feasible, but I shouldn't try to sell one to anybody?  I'm not too 
>well versed in patent law...
>
>       -eric
><HTML><FONT FACE=arial,helvetica><HTML><FONT  SIZE=2 PTSIZE=10
FAMILY="SANSSERIF" FACE="Arial" LANG="0">In a message dated 11/9/2004
10:28:59 PM Eastern Standard Time, sasami at hotkey.net.au writes:<BR>
><BR>
><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT:
5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">>Basically, how feasible would
it be to amp a mic signal, use that to drive a <BR>
>>very large inducer placed next to a bunch of strings tuned to whatever <BR>
>>frequencies you want to resonate the most, and have a pickup at the
other<BR>
>end of the <BR>
>>strings?  Re-tunable resonance simulator... I've ben considering
building such <BR>
>>a device for a while now.<BR>
><BR>
>You aren't the first to have the thought. You won't be the last. The idea<BR>
>was patented in the early 80's, which amused me, because I'd thought of the<BR>
>idea prior to that. After all, what the heck is a piano! Hold down the<BR>
>sustain pedal, and that is exactly what you have. I used to use it to<BR>
>resonate the organ which was in the same room.</BLOCKQUOTE><BR>
><BR>
>So it is feasible, but I shouldn't try to sell one to anybody?  I'm
not too well versed in patent law...<BR>
><BR>
>       -eric</FONT></HTML>
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>