anyone here tried to make a panel speaker/dipole tweeter with PVDF films?

mondogenerator · 4th March 2010, 05:17 AM

Ive searched and only found one reference to PVDF here, but for use in an Ultrasonic app. From what i read it isnt as new as the polymer prices would have you believe, and more than likely its all been done before.

however, It does interest me alot, tbh ever since Audax DIY stuff disappeared, and with it went the piezo bubble tweeter. Granted most lost pressure and eventually died, but still, what an inspired idea!

Id love to get a hold of some PVDF and make a small dipole mid/tweeter, maybe a heil effect pleated affair would even work.

ANyone out there with experience to share, or comments to make on this?

båndsei · 06:50 AM

I use polyethylen film, LDPE, for planarspeakers.It is 10 my thick or 0.0095mm.It is used in kitchen for covering food.
Other uses mylar film,it is stronger but rattles more.You can get mylar as thin as 4 my.

kavermei · 4th March 2010, 07:46 AM

Do you mean you want to use the piezoelectric property of the film to produce sound? Would that work at audible frequencies?

Ouroboros · 4th March 2010, 08:58 AM

Have you seen the price!!!
180mm by 180mm, 110 micron thickness, with gold electrodes on both sides costs £710.

(From Precision Acoustics (PAL) | Homepage )

Ouroboros · 4th March 2010, 09:02 AM

Whoops, that was for a different material. £225 for PVDF.

You'll need deep pockets to try out the idea then...

mondogenerator · 4th March 2010, 04:28 PM

and to those that asked, ....YES i am planning on trying to use a PVDF film to produce AUDIBLE sound

i have no idea if it is possible though hehe...

Steve Dunlap · 4th March 2010, 06:46 PM

Quote:

Originally Posted by mondogenerator

and to those that asked, ....YES i am planning on trying to use a PVDF film to produce AUDIBLE sound

i have no idea if it is possible though hehe...

It has been done.

Pioneer HPM-100 - Wikipedia, the free encyclopedia

mondogenerator · 4th March 2010, 10:20 PM

Quote:

Originally Posted by Steve Dunlap

It has been done.

Pioneer HPM-100 - Wikipedia, the free encyclopedia

ok so its been done AGES ago.....does the film SOUND any good?

Steve Dunlap · 5th March 2010, 03:48 PM

Yes, the speakers sounded pretty good from the upper midrange on up. The cone lower mid and woofer were a little lacking, IMO.

Few · 6th March 2010, 01:15 AM

I believe this is what the highly regarded Gallo speakers are using.

I played with piezo film samples that were available in the 80s and managed to generate sound, but I was in serious "newbie" mode so the experiments didn't go very far. I do believe, though, that diy PVDF tweaters are a very viable alternative to more popular approaches.
Few

4th March 2010, 05:17 AM	#1
mondogenerator diyAudio Member Join Date: Sep 2009 Location: England	anyone here tried to make a panel speaker/dipole tweeter with PVDF films? Ive searched and only found one reference to PVDF here, but for use in an Ultrasonic app. From what i read it isnt as new as the polymer prices would have you believe, and more than likely its all been done before. however, It does interest me alot, tbh ever since Audax DIY stuff disappeared, and with it went the piezo bubble tweeter. Granted most lost pressure and eventually died, but still, what an inspired idea! Id love to get a hold of some PVDF and make a small dipole mid/tweeter, maybe a heil effect pleated affair would even work. ANyone out there with experience to share, or comments to make on this? __________________ Its a case of Perception:You never stop being a 'Noob' (a term banned on many social gaming sites), Ego is the Thing that tells Us otherwise.

4th March 2010, 06:46 AM	#2
båndsei diyAudio Member Join Date: Dec 2008	I use polyethylen film, LDPE, for planarspeakers.It is 10 my thick or 0.0095mm.It is used in kitchen for covering food. Other uses mylar film,it is stronger but rattles more.You can get mylar as thin as 4 my. Last edited by båndsei; 4th March 2010 at 06:50 AM.

4th March 2010, 07:46 AM	#3
kavermei diyAudio Member Join Date: Jan 2005 Location: Lokeren, Belgium	Do you mean you want to use the piezoelectric property of the film to produce sound? Would that work at audible frequencies? __________________ Never send a human to do a machine's job. --Agent Smith

4th March 2010, 04:28 PM	#6
mondogenerator diyAudio Member Join Date: Sep 2009 Location: England	and yes and to those that asked, ....YES i am planning on trying to use a PVDF film to produce AUDIBLE sound i have no idea if it is possible though hehe... __________________ Its a case of Perception:You never stop being a 'Noob' (a term banned on many social gaming sites), Ego is the Thing that tells Us otherwise.

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4th March 2010, 08:58 AM	#4
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	Have you seen the price!!! 180mm by 180mm, 110 micron thickness, with gold electrodes on both sides costs £710. (From Precision Acoustics (PAL) \| Homepage )

4th March 2010, 09:02 AM	#5
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	Whoops, that was for a different material. £225 for PVDF. You'll need deep pockets to try out the idea then...

5th March 2010, 03:48 PM	#9
Steve Dunlap diyAudio Member Join Date: Sep 2008 Location: Here	Yes, the speakers sounded pretty good from the upper midrange on up. The cone lower mid and woofer were a little lacking, IMO.

6th March 2010, 01:15 AM	#10
Few diyAudio Member Join Date: Apr 2004 Location: Maine, USA	I believe this is what the highly regarded Gallo speakers are using. I played with piezo film samples that were available in the 80s and managed to generate sound, but I was in serious "newbie" mode so the experiments didn't go very far. I do believe, though, that diy PVDF tweaters are a very viable alternative to more popular approaches. Few

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