Better than ESL?....
oscarc...@my-deja.com
spent, those science people come along with :
http://helix.nature.com/nsu/000217/000217-8.html
barry, insert your comments here:
Sent via Deja.com http://www.deja.com/
Before you buy.
bope...@my-deja.com
oscarc...@my-deja.com wrote:
> just when you think that the 70K you spent on the statements was well
> spent, those science people come along with :
>
> http://helix.nature.com/nsu/000217/000217-8.html
If you remember a long time ago at a hi fi show there was someone
that was introducing a new way to make music from a "diaphragmless"
speaker, it was accomplished by using the pressure created from a flame
to move the air, it was loud and it did work, but it never caught on,
to many drawbacks. I am not saying that this is not the way of the
future. Of course at one time the ESL was a new technology or "fad"
that people thought would never catch on.
sndla...@aol.com
bope...@my-deja.com wrote:
> In article <88t3ic$7ns$1...@nnrp1.deja.com>,
> oscarc...@my-deja.com wrote:
> > just when you think that the 70K you spent on the statements was
well
> > spent, those science people come along with :
> >
> > http://helix.nature.com/nsu/000217/000217-8.html
Thanks for the interesting link, at least some people are still trying
to come up with better means of producing sound. One particular claim
made on the page that bothers me is relative to it's output ability. No
matter what they are doing, making sound still involves moving air,
which requires some sort of displacement. My first reaction is that
this will fall into place somewhere around the NXT speakers which made
big news a few years ago, and have seen good use for computer speakers.
The only odd thing to me is that this seems to be nothing more than a
piezio film, attatched to some structure suspending it. Also, it seems
the plane of material would be excited by a voltage, but in random modes
rather than generating even, piston-like motion. Mind you that the NXT
technology works in a similar way.
>
> If you remember a long time ago at a hi fi show there was someone
> that was introducing a new way to make music from a "diaphragmless"
> speaker, it was accomplished by using the pressure created from a
flame
> to move the air, it was loud and it did work, but it never caught on,
> to many drawbacks. I am not saying that this is not the way of the
> future. Of course at one time the ESL was a new technology or "fad"
> that people thought would never catch on.
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
You would likely be refering to the episode Mr. Nelson Pass had at one
CES where he was carried out on a stretcher due to one of the
technologies primary downfalls.... the byproduct ozone it produces!
Mark Seaton
Barry Waldron
oscarc...@my-deja.com wrote:
> just when you think that the 70K you spent on the statements was well
> spent, those science people come along with :
> http://helix.nature.com/nsu/000217/000217-8.html
> barry, insert your comments here:
Thank you for wanting my input, although, I would also like to hear
what Mark and Rob have to say, also.
The technology is interesting, yet unclear from the brief description.
Perhaps the diaphragm does undulate in waves as someone suggested,
however, one could also infer that because the film is attached to a
perimeter frame the motion is like that of a piston.
I would like to know just how loudly a two sq. in. speaker will play
and over what frequency range. One could deduce that it will play
loudly providing the ear is close--like for use in a headphone. It
seems unlikely that the film has much excursion, as described, there-
fore a much larger panel would be required in order to create room
filling sound.
Bass output seems to be a given, yet here again, excursion and acreage
are a requirement for dipole radiators that must also contend with
f/b phase cancellation. Perhaps this is a monopole device.
The stated fact that the film can operate at higher voltages also
poses more questions than it answers. The amount of high voltage
needed to adequately move a diaphragm in and ESL is predicated in
part upon the d/s spacing. The maximum amount of voltage that can
be withsood before arcing is dependent upon, among other things,
the integrity of the insulation and of the panel's construction.
That a "high" voltage can be applied to thin-film material without
breakdown is interesting. One wonders the age old question of how
high is high? It also gets us back to how much excursion can be had.
I am unable to read the JASA article. If someone has and can shed
more light on the subject, please contribute.
As an aside, the "Wraith" loudspeakers made by MZX employ a sandwich
diaphragm that is somewhat different. This loudspeaker is similar to
an ESL in size and scope, but differs in that the diaphragm is an
electrolytic device and does not need a bias voltage. In this regard
it seems to behave similarly to an electret element. http://www.mzx.com
I would like to see the data sheet on this material and when and if it
will be generally available.
Barry
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