Dispersion Interactions. MartinLogan AEON

D

ISPERSION

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NTERACTIONS

Controlled Horizontal Dispersion

Your Aeons launch a 30-degree dispersion pattern when viewed from above. This horizontal dispersion field gives a choice of good seats for the performance while minimizing interactions with side walls (See Figure 6). Make sure both speakers stand exactly at the same vertical angle, otherwise the image can be skewed or poorly defined. The wave launch of both speakers is extremely accurate in both the time and spectral domain. Consequently, small refined adjustments can result in noticeable sonic improvements.

Controlled Vertical Dispersion

As you can see from the illustrations, your Aeon speakers project a controlled dispersion pattern. Each Aeon is a 3-foot line source beginning 18.5 inches above the floor level

(See Figure 7). This vertical dispersion profile minimizes interactions with the floor and the ceiling.

Three Major Types of Dispersion

In the field of loudspeaker design, it is a known fact that as the sound wave becomes progressively smaller than the transducer producing it, the dispersion of that wave becomes more and more narrow, or directional. This fact occurs as long as the transducer is a flat surface. Large flatpanel speakers exhibit venetian blind effects due to this phenomenon. This is why most manufacturers opt for small drivers (i.e., tweeters and midrange) to approximate what is known as a point source wave launch.

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 elegantly simple, yet very difficult to execute solution. By curving the radiating surface, we create the effect of a horizontal arc. This allows the engineers at

MartinLogan to control the high frequency dispersion pattern of our transducers. That is why you see the gentle curve on our products.

Figure 6. MartinLogan Aeon’s deliver a 30-degree wave launch dispersion pattern distributed horizontally.

Figure 7. Your Aeon speaker system is a 37 inch line source when viewed vertically. Actual height above floor is from 18.5 inches to 56 inches.

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Figure 8–9. As can be seen here, point source concepts invite a great deal of room interaction.

While delivering good frequency response to a large listening audience, imaging is consequently confused and blurred.

Figure 10–11. Even though they suffer from

“venetian blind” effect, angled multiple panel speakers can deliver good imaging, but only to specific spots in the listening area.

Figure 12–13. A controlled 30-degree cylindrical wave-front, which is a MartinLogan exclusive, offers optimal sound distribution with minimal room interaction. The result is solid imaging with a wide listening area.

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