Discussion in 'Home Cinema Speakers' started by buns, May 9, 2002.
no on interested
I read a short write up on this last week whilst on a boring train journey.
Phase technology has been around for years and is used in many applications including radar, sonar, antenna's and even radio telescopes which is where Tony Hooley comes in. Dr Hooley is/was a radio astronomer that has started up a company called "1 Limited" who will design and market these speakers.
I must tell you that many folks are already using phase tech in their home cinema systems. Read Di-poles. If you don't like these (and I don't) you probably wont like what Hooley is doing.
In fact, a company by the name of Dahlquist has been making phased array speakers for quite a while now using around a half dozen drivers in their design.
Hooley has (for want of a better word), "improved" on other phased systems by using multiple arrays of very small drivers (more than a hundred) on a single panel. Apparently these drivers can be 'focused' to a degree which helps to tune the panel to the given room.
Whats happens next is a trick. The panel (which he rather cleverly calls "The Sound Projector", (he must have graduated from the Bose school of marketing) sends out 'out of phase' sound pressure which hits many surfaces in your room at slightly differing times which in turn is reflected everywhere to create a glorified mess This supposedly gives a feeling of spaciousness, or "sound coming from everywhere" as they say in their blurb.
In marketing lingo, multi channel sound from one speaker.
My feelings are that their claim of being able to accurately reproduce five or six speaker multi channel sound quality with one panel should be taken with a pinch of DAV salt.
I'm sitting with the article right now. I agree any claims should be taken with a pinch of salt but it really makes good sense.
The panel sends a whole load of signals which have varying phase relationships with each other thus creating an interference pattern which is audible. Upon reflections at walls or such likes, these phase relationships change, thus so does the interference pattern and what you hear....I think. In that much there is no reason whatsoever that the concept wouldnt work, in fact it potentially could be better than a 5 channel system because it would effectively be using every square inch of wall space as a speaker....ala infinite no. of speakers......you try managing that with conventional designs!
The problem I would immediately envisage is how to set the thing up. To achieve the necessary effect the panel would need tuned for the room......I dont really follow how that could be done without the use of pretty complex sound measurement devices.
just thought it was interesting!
.. and if someone moves a chair a few feet, or the door is open instead of closed everything changes again ...
Sounds like a great idea in a controlled space, not so sure this would work in a normal home environment.
yeah.....thats what i thought. I'll assume that such small changes wont cause massive problems, rather just upset the absolute performance.
a product of the future i beleive.
Quite right Mark but that applies (variably) to just about everything. I had a chance to look at their website today and see that Dr Hooleys idea of 'tuning' actually means moving the furniture and yourself all over the place.
I think I prefer the word 'Video' in front of projector.
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