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Re: Ultimate realization of this technology

I've only seen photos of them. I think they go back to the 1970s and looked very interesting. The problem of flat power response is critical. Actually it's the problem of flat power transfer from the speaker to the listener. Peter Snell said what came out of the speaker wasn't important, it's what arrives at the listener which counts. This IMO is why most designs fail. Whether you like it or not, unless you live in an anechoic chamber there will be reflections. You can ignore them, pay lip service to them, try to somehow eliminate them, or exploit them. This last strategy IMO can be the most successful one. Recognizing that you have to create a soundwave which will be partially reflected and partially absorbed by the room boundaries, you have to arrange a field which compensates for this by generating more energy at those frequencies which will be absorbed most. This means that even a pulsating sphere with flat response would not be ideal in a real room. The indirectly radiated wave would still have to contain more HF energy to overcome the fact that those frequencies will be absorbed to a greater degree. Obviously, this has to be adjustable to accomodate different rooms to work well in all cases. So what you want is a speaker which delivers both flat FR of the sound radiating directly at you and flat FR of its reflections. No store bought speaker I've ever heard even comes close.

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