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In the Forum: Horn-Loaded Speakers
In the Thread: How to USE “Resonating Oops” in loudspeakers
Post Subject: I absolutely disagree.Posted by Romy the Cat on: 12/5/2007

 Winnie wrote:
In talking with Shelly Katz a few days ago, I brought up the topic of how sound is perceived in the context of layered sound or indeed oops. He is a very busy man and we did not have long to develop the conversation, but this is the thrust of what he said.

With Layered Sound there is no need to time align drivers, the 'signals' being delivered from the panels are not compromised by being out of time alignment by a few milliseconds.

Apparently the sense of hearing behaves very similar to the sense of sight. If you look across a road to a car then the eye will bring the car into perfect focus, All around ,there will be objects that are closer and further away. They will contribute hugely to the overall picture even though they are not in perfect focus.

If you have (say) a horn speaker that is in perfect focus acoustically then it does not matter if the oops effect or indeed the panel speaker is some way 'out of focus'. The brain will acclimatise rapidly and will primarily hear the horn, but with 'enhanced' acoustics supplementing its performance.

The danger might be if you have the 'distortion/effect' at the same point source as the main speaker. In this case the brain can't discriminate and may only perceive that the main speaker is distorting.

I hope this is not all rubbish!


What Shelly Katz is saying might be valid ONLY in case is his loudspeakers are being use as ONLY source of sound. I still do not know how Layered Sound are design but from what I experienced with large panel speakers  was the fact that they could not be properly time-aligned even theoretically and they do the inner-bobbing and smear the wave front. Still, if the Layered Sound speakers is being used as an Injection Channel complimentary with other (presumably time coherent) acoustic system then what Shelly Katz stated is completely false. Furthermore the analogy with the car and the sense of sight is absolutely not applicable and frankly speaking I am surprise that he even brought such a bogus illustration.

Rgs, Romy the Cat

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