PIEZO NXT type panel - Page 57

CLS · 8th April 2011, 01:07 AM

Quote:

Originally Posted by LineArray

...

nevertheless your
"standing pendulum" will have higher order
"bar modes"....

...

Yes, you're right. (and, what a perspective! )

In addition, it's very interesting to find the sticks are vibrating with the signal, while the excitors stay still, almost dead still by touching feel.

The 'pivot' of the stick at the bottom is also vibrating, but I can't make sure if this is the stick itself, or transmitted from the frame (indirectly from panel) -- the whole supporting frame is vibrating along the music and I haven't done anything to it, yet.

Quote:

Originally Posted by LineArray

...

The panel is acting upon the spring predominantly,
which is given by the VC suspension of the exciter.
...

And this spring is connecting magnet of excitor and the panel on its both ends. I was thinking, should I add some more mass to the excitors? So I can have a bigger 'hammer', and then the panel would be kicked furthur away (larger excursion, higher SPL)

But the small excitors are dead still already! I don't get it.

Oh, this won't show up in any audio show. It's just a personal toy

CLS · 19th April 2011, 03:51 AM

Quote:

Originally Posted by tylersphile

....

When I get back in town, I will attempt to provide pictures (as the wood is quite beautiful).
....

Hi,

Any update?

Big Jake · 20th November 2011, 01:23 PM

Hi fellas,
I was following this with great interest, a year and a half ago. My brother in law and I built a set of these and were disapointed with output level and crappy highs. I know there were a lot of ideas thrown around about fixing the highs, but we tried something simple that helped imensly. I have a pair of bose 901's, and tried the equalizer. What a difference! Still not great ,but a step forward. Again, this is not my profession so the tech talk is often above my head, but maybe this helps move this project forward.

jzagaja · 30th January 2012, 06:23 PM

Anyone tried an accelereometer for finding optimum exciter placement?

pol_bct · 31st January 2012, 01:43 AM

Quote:

Originally Posted by jzagaja

Anyone tried an accelereometer for finding optimum exciter placement?

Hi jzagaja,
the tip of finger is very sensitive to small movements
this is the way I found the 1/3-2/3 placement....

POL

jzagaja · 31st January 2012, 04:46 PM

Even on high frequencies

Professional way (despite vibrometer and mic array) is:
Scan & Paint - Products - Microflown

LineArray · 05:57 PM

Quote:

Originally Posted by jzagaja

Anyone tried an accelereometer for finding optimum exciter placement?

Hi,

the exciter actually is an accelerometer, by closer evaluation of the
impedance at a certain driving point ... more usable at lower
frequencies of course.

Cheers

stera66 · 31st March 2012, 08:21 PM

Did someone build exciter from scratch?
Where can I find plans for exciter motors?

Antoinel · 31st March 2012, 08:58 PM

I looked at the first thread. Its author excited the edge of a membrane with piezo drivers; to make a loudspeaker. There is an existing flat panel technology called Edge Motion by Emo Labs. Search Bing for Emolabs. Scroll down to the heading. Hear that; Boston... The U tube video shows the CEO or equivalent of Emo Labs demonstrating this new tech speaker.

stera66 · 2nd April 2012, 10:29 PM

Sorry I overlooked that the topic is about piezo exciters.
I'm more interested in Bertagni type of panels.

30th January 2012, 06:23 PM	#564
jzagaja diyAudio Member Join Date: Jun 2004 Location: Szczecin	Anyone tried an accelereometer for finding optimum exciter placement? __________________ Group buy list: http://www.diysoundgroup.com/ Visit us at http://www.horns.pl/

31st January 2012, 04:46 PM	#566
jzagaja diyAudio Member Join Date: Jun 2004 Location: Szczecin	Even on high frequencies Professional way (despite vibrometer and mic array) is: Scan & Paint - Products - Microflown __________________ Group buy list: http://www.diysoundgroup.com/ Visit us at http://www.horns.pl/

31st March 2012, 08:58 PM	#569
Antoinel diyAudio Member Join Date: Jan 2012 Location: Pennsylvania	Emo Labs or Edge Motion Technology I looked at the first thread. Its author excited the edge of a membrane with piezo drivers; to make a loudspeaker. There is an existing flat panel technology called Edge Motion by Emo Labs. Search Bing for Emolabs. Scroll down to the heading. Hear that; Boston... The U tube video shows the CEO or equivalent of Emo Labs demonstrating this new tech speaker.

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20th November 2011, 01:23 PM	#563
Big Jake diyAudio Member Join Date: Nov 2011	Hi fellas, I was following this with great interest, a year and a half ago. My brother in law and I built a set of these and were disapointed with output level and crappy highs. I know there were a lot of ideas thrown around about fixing the highs, but we tried something simple that helped imensly. I have a pair of bose 901's, and tried the equalizer. What a difference! Still not great ,but a step forward. Again, this is not my profession so the tech talk is often above my head, but maybe this helps move this project forward.

31st March 2012, 08:21 PM	#568
stera66 diyAudio Member Join Date: Feb 2006 Location: Belgrade	Did someone build exciter from scratch? Where can I find plans for exciter motors?

2nd April 2012, 10:29 PM	#570
stera66 diyAudio Member Join Date: Feb 2006 Location: Belgrade	Sorry I overlooked that the topic is about piezo exciters. I'm more interested in Bertagni type of panels.

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