Sound Systems: Design and Optimization: Modern Techniques and Tools for Sound System Design and Alignment by McCarthy Bob

Author:McCarthy, Bob [McCarthy, Bob]
Language: eng
Format: azw3
ISBN: 9781317911081
Publisher: Taylor and Francis
Published: 2016-02-25T16:00:00+00:00

9.3.3.2 Asymmetric Uncoupled Point Destination

The right panel of 9.20 shows the asymmetric version, recognizable as the vertical plane of the “delay speaker.” Assuming the systems are synchronized, we can observe the forward-range extension provided by the delay speaker.

FIGURE 9.20 Minimum-level variance shapes for the uncoupled point destination array. Left: symmetric version. Right: asymmetric version.

The combined levels reduce the loss rate over distance, thereby creating a forward line of equal level on axis to the elements. This is the only means of level extension that does not rely on the offsetting effects of distance and axial loss rates. When used in combination with those effects, the loss rate can be reduced to the lowest amount practical. Here the on-axis responses combine for a 6 dB level increase. The locations before the meeting point are both closer and more off axis to both elements, thereby providing a level stalemate. The range of forward level extension depends upon the distance/level ratio (previously shown in Fig. 9.18).

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