Inflatable Loudspeakers
fm6 sent in an article running at New Scientist talking about new technology that allows Inflatable Loud Speakers. The technology is apparently patented and there's not a lot of technical details, but I have to say the concept amuses me. And I somehow doubt that this technology will ever be used in high fidelity home systems.
you need to blow air into for it to play sounds...
Flute, anyone?
Make even shorter URLs - 8LN.org
All I need now is an inflateable stero and some inflateable CDs. Seriously though, how cool is this? And wouldn't it be awesome to inflate/deflate them while their ON? Bet that would sound awesome.
Comment forecast: Bits of genius surrounded by a sea of mediocrity.
Since when do roadies complain of back problems? Is this opening the doors up to elderly women who want to travel with bands and set up stages? A 4x12 cabinet is not that heavy at all, some even have wheels, and most of them have handles. They're not awkward. I used to lug mine around when I was a 120 pound stick in high school.. Ah well.
Also, if these things are so light, it would be funny to see the speakers push so much air that the air-cabinet starts floating away.. I wouldn't dare stack these things, a gust of wind could stop a concert..
This definitely didn't have to change.. I just hope it's a proof of concept, and they'll find something better to apply this technology to at a later time.. (Pool speakers???)
If you fill them with helium, will your music sound like the chipmonks?
Disconnect your television. Do your own research. Draw your own conclusions. They're probably lying. Don't be a sheep.
I thought the patent process requires that the inventor disclose information about how the product works, and after the patent expires the public can use it freely. Isn't it opposed to a trade secret, where the inventor doesn't get protection if someone else reverse-engineers the product or happens to invent the same thing independently?
A speaker driver is mounted in a flat, rigid board bonded to a large bladder. When the bladder is inflated, it expands to form a box shape resembling a speaker cabinet.
I'd like to see the first time someone tries to dramatically smash their guitar against the speakers at the end of a set.
Inflatable loudspeakers could blow out roadies
so now rock bands will want to set up there own system? including filling them full of air? what about the speaker itself, will that suddenly get lighter?
talk about trying to market to a problem that doesn't exist, sheeesh.
if all things are equal(same sound quality, etc,etc,etc...) then there only advantage is less storage space. Which is a cost savings advantge.
The Kruger Dunning explains most post on
Now I am starting to get scared.
"It is a greater offense to steal men's labor, than their clothes"
I'll to get some to entertain my *inflate* *inflate* girlfriend..
Somewhere, something incredible is waiting to be known. -- Carl Sagan
And if you want your bass to go boom, you over-inflate them.
I've worked with some SoundTube products before. They were excellent. We used thew in several hanging locations and on the ground in theme parks, so they received a 70 volt distributed PA signal. They played a mix of classical and pop music all day. Sound quality was not excellent, but certainly very good. They were very power efficient and very durable. Bats, Birds, Bees, rain, manure, even lawnmovers attacked these things on a daily basis and they still worked great. One of the nicest outdoor PA speakers I ever worked with.
I fancy myself something of an audiophile, and I can say with all certainty that the inflatable loudspeaker is the most exciting new development in the home audio world of the last 5 years.
Last month's issue of Home Audiophile Review carried an interesting article on the possiblities of the new, inflatable enclosures. Essentially, we will be able to get distortion down to unheard of low levels. The possiblities presented by speaker enclosures in novel shapes is also interesting. Imagine a spherical, or for that matter, tetrahedral, enclosure. You can't do that with wood. Another plus: the enclosures could be filled with nitrogen so as to minimize corrosion of the internal speaker components, thus lengthening product-life and improving sound quality.
Seriously, I (as a musician with a little experience building cabinets for 18" and smaller drivers), seem to remember that the heavier, the better - at least for Bass Enclosures.
I doubt there is a valid market.
The day has passed since JBL rocked with alnico magnets - you could walk into a music store with a notepad and tape measure, then go back you your garage and cut up some 3/4" or 5/8" particle board, and save big bucks. No patent infringement - I didn't sell 'em - no, really! ;-)
db
Cig:
ôô
Pump up the Jam! Pump it Up! Pump it UP!!
Quando Omni Flunkus Moritati
"..rock groups need roadies to hump.."
No. Those are groupies.
Patent Number: WO0154541 (UK)
Publication date: 2001-08-02
Inventor(s): WIENER DAVID
Applicant(s):: SOUNDTUBE ENTERTAINMENT INC (US)
A speaker assembly (100) is provided including a rigid front speaker mounting element (102) defining at least one speaker mounting opening (103), at least one speaker driver (104) coupled to the at least one speaker mounting opening (103) of the speaker mounting element (102), at least one flexible bladder (106) at least partially forming the sides and rear of the enclosure and coupled to the speaker mounting element (102), and a valve (108) coupled to the flexible bladder (106). The flexible bladder (108) has a first wall portion (110) and a second wall portion (112) defining a substantally air-tight interior space (114) therebetween and may take any desired shape when inflated. Together, the speaker mounting element (102) and the bladder (106) form at least one interior chamber (116) at least partially surrounding the speaker driver (104). The valve (108), which provides a substantially air-tight seal when closed, is in fluid communication with the interior space of the flexible bladder (106) and can be used for inflation and deflation of the bladder (106). The bladder (106) is inflatable by providing either pressurized gas or expandable foam within the interior space. Alternatively, the bladder may be formed as a plurality of independently inflatable cells, or may be evacuatably-formed from a material having shape retaining memory properties. After use, the bladder (106) enclosure may be removed from the speaker mounting elemet (102), and deflated for reuse, or disposed of.
Think of all the bands that can't afford to fly their equipment around. Now they could.
I bet there is some really interesting things that could be done with this technology.
For instance, could you change the response of the speakers by adding more air pressure inside of the enclosure? Seems like you could easily tune for each song if you wanted to.
The man who trades freedom for security does not deserve nor will he ever receive either. - Benjamin Franklin
The audio world is crawling with hopeful inventors who don't understand much about sound and electro-accoustics. I've had the privilege of seeing many of these "inventions" first hand. The article failed to address the key issue behind "inflatable speakers": rigidity. In a vented box, which is the most common type of low-frequency and very-low-frequency system, the walls need to be pretty rigid to prevent distortion and energy loss. If these inventors have some way to make a balloon as rigid as 3/4" birch plywood with closely spaced transverse braces, the article doesn't mention it.
The only kinds of speaker enclosure that aren't concerned with rigidity are those that simply enclose rigid horns made of fibreglas, plastic or wood. In these situations, the enclosure merely protects the components from dust, water and damage and does not serve an accoustic funciton. JBL among others has realized this and is making a series of touring speakers which are simply frames of metal tubing with no side walls. Again, inflatable walls would add nothing to such a system.
As for the "beach ball" idea, this can be interpreted in two different ways, due to the lack of detail in the article. If you make a conventional (sealed or vented box) speaker system with spherical form, it will have a sharp resonant peak related to the diameter of the sphere. This peak can be reduced by increasing the absorbent material inside the enclosure, but still reflects a design mistake. A sphere is the worst possible shape for a conventional speaker enclosure. A second application of a sphere is to place it in front of a speaker (possibly a tweeter) creating in effect a radial horn. By careful positioning, two or even three transducers could share one sphere. An inflated beach ball could work for high and even mid frequencies. As the frequency gets lower, however, the need for rigidity of the sphere increases. In general, the sphere should be hard and rigid.
Such a system will never work as well as separate, properly designed horns for the separate transducers. Its only benefit is visual gimmickry and possible cost savings.
In my church, they would be easy to hang from the top of the ceiling. (I can't imagine what it's like lifting a 30lb speaker all the way up there!)
For outdoor concerts, they could be filled with helium, and allowed to float. Wouldn't it be awesome to see the speakers fluttering in the wind!
And, in my living room, I might get 5 small ones to hang from my ceiling fan.
I can't wait!
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If you could make speakers and enclosures out of lightweight materials, it would have been done long before now.
They're made out of 3/4th-inch plywood to take the stress of constant packing and unpacking.
I predict the first tour that tries to use these things will end up with what looks like the first all-duct-tape speaker enclosures by the end of the trip.
--Blair
those kids in their souped up hot-air balloon, flying all around the block, with their rap music blaring... You can hear the bass for miles...
There used to be a time when the sound those kids could make was limited to volume/carrying capacity of a honda civic.
Damn that Alyson Hannigan is sexy...
It doesn't mean much now, it's built for the future.
I don't believe it for a minute.
Distortion down to 'unheard of low levels'? Hype city. There is absolutely no plausible mechanism to support this claim. As for transdcuer shapes, such as tetrahedral, it's almost completely irrelevant as far as sound quality goes.
Loudspeakers don't have a limited lifetime because of corrosion. It's usually fatigue of the constituent materials, of which an inflatable plastic would certainly be about the worst.
These might be a good gimmick, but nothing more. I think their egos need a bit of deflating.
They're apparently using NXT flat panel techniques. No wonder this is so full of mindless hype.
I think it's time to deflate the hype surrounding these things a bit.
They basically use an inflatable structure (not unlike a beachball) as a loudspeaker enclosure, and attach a flat-panel loudspeaker to the front. Voila.
Performance of these will be questionable, at best, and they will certainly not have the performance they're claiming. Utter nonsense. They've provided absolutely nothing to support their claims.
Loudspeaker enclosured are designed to be rigid for a reason - they're essentially used as baffles and resonant structures, that, when properly designed, will provide a reliable, efficient, output of sound. An inflatable loudspeaker will not have any rigidity, thereby eliminating its use as a baffle, and severely diminishing low frequency performance. Second, the fact that the air will be expected to leak over time will change the resonant structure significantly, eliminating any possibility of consistent performance, if it even could be attained in the first place.
Now, an inflatable loudspeaker might be a nice gimmick, but it will absolutely not be a performance product. Not even close.
This is all hype, folks, nothing to see here - move along.
Oh, they're apparently VC funded? Go figure with the outlandish claims!
I think it has more to do with buyer perception than gee-whiz technology, although it could have some application for bands on the road or PA events.
OS/2 - because choice is a terrible thing to waste.
Just because they are LOUDspeakers doesn't mean they have to be QUALITY speakers. They just have to be LOUD.
I am !amused.
What will raveGrrrls stand on top of to dance? What will dweebBoyz jump from to crowd surf? My whole '90s world -- gone!
At least I'll always have my tribal tattoo.
In a multi bladder system, this seems like it would give good absorption of energy, and add structure and weight to the system, which would be useful in an outdoor/windy/explosion prone environment. The article doesn't mention that as part of their plan, but I wonder if it would be of any sonic benefit.
Often in Error, Never in Doubt.
This would complement car audio nicely! No need to fill up your entire trunk with a sub box, just inflate when you need it and it will pack away nicely when you don't.
Anyways, don't discount the inflatable speakers as things that wouldn't work... these guitars worked really well. I saw them first in the Boston Museum of Fine Arts...
The article mentions Ellula Sounds Ltd. (not to be confused with EULA). A quick google search gives an article with a picture. See also Ellula's corporate page.
--Ben
"...new technology that allows Inflatable Loud Speakers..."
:-P
I'm sorry, but this technology has been around for many years. It's called a "whoopee cushion."
Give me my freedom, and I'll take care of my own security, thank you.
OFFTOPIC? Who the hell is smoking crack?
GAH...How *freaking ON TOPIC* can a post be?
Shit, I should just change my name to 3M (Moronic Moderator Magnet) but it is taken.
Grrrr...man there is one __HUMOR IMPAIRED__ mother f**ker out there....
Ok, metamoderators...do your job, please. I know I do for moderators like this, who, would not know an on topic post if it bit them in the nads.
Has anyone thought of a way to aviod this kind of crap? Like if metamoderators judge 4 out of 5 *negative* moderations as unfair, flag the moderator as "clueless" or needs a smack or something?
"Who Needs a LOUDSPEAKER when we have SLASHDOT"
I thought it was pretty damn funny...*and* no one else said it? If I had been modded as redundant *and WAS* redundant...cool.
Moose.
Slightly paranoid, cause _someone_ IS out to get me. Tis the 2nd time an *ON TOPIC POST* has been modded down.
Ontopic, interesting, insightful flaimbait, yeah, that's me.
Maybe I should *drop* my +1 bonus when I type something funny? Heh, it work before... because I get the feeling the humor impaired with mod points browse at +2.
(SIGH) My own damn fault for thinking moderators *might* have a sense of humor...not so, but at least it helps me maintain my sense of irony.
Pheh.
Have you read the moderator guidelines? Well, have you, PUNK? (and I want a Karma: Gnarly option)