Dispersion Concepts

Room Acoustics

In the field of loudspeaker design, it is common knowledge that as the wave becomes progressively smaller than the transducer producing it, the dispersion of that wave becomes more and more narrow, or directional. This occurs as long as the transducer is a flat surface.

Historically, most attempts to achieve smooth dispersion from large flat panel transducers resulted in trade-offs. After exhaustive testing of these different solution attempts, we found an ele- gantly simple, yet very difficult to execute solution. By curving the radiating

surface, we create the effect of a horizontal arc. This allows the engi- neers at Martin-Logan to control the high frequency dispersion pattern of our transducers. That is why you see the gentle curve on our products.

As can be seen, point source concepts invite a great deal of room interaction. While delivering good frequency re- sponse to a large listening audience, imaging is consequently confused and blurred.

Even though they suffer from "venetian blind" effect, angled multiple panel speakers can deliver good imaging, but only to specific spots in the listen- ing area.

	A controlled 30-degree cylindrical
	wave-front, which is a Martin-Logan
	exclusive, offers optimal sound distri-
	bution with minimal room interaction.
	The result is solid imaging with a wide
	listening area.
Page20	Monolith III User's Manual