Sunset Center, Carmel, California

Current Hall Layout (Wood Ceiling replaced with Plaster)

Case 3. Multiple sources (#1 through #5) located across the stage. Listener #1 on the left side of the hall half-way back; Listener #2 near the left rear corner; Listener #3 at the center of the hall.

Figure 1. Parametric view of hall and stage; red lines from “1”, “2”, “3”, “4”, “5” are the sound sources. Listeners #1, #2, and #3 are shown in blue.

Figure 2. Plan view of hall and stage; red lines from “1”, “2”, “3”, “4”, “5” are the sound sources. Listeners #1, #2, and #3 are shown in blue.

Figure 3. Early Decay Time (EDT) throughout the hall for source “1” to “5”. Decay times in the front 40% of the hall are OK. The rest of the hall is in excess of 3 seconds, somewhat longer than desired.

Figure 4. Clarity in the rear half of the hall is poor, especially near the side and rear walls.

Listener #1 (Left Side of Hall)

Figure 5a. Reflectogram (no direct sound; delay ~0.10 sec) Figure 5b. Sound Rose

Listener #2 (Left Side, Rear of Hall)

Figure 6a. Reflectogram (direct sound; delay ~0.11sec) Figure 6b. Sound Rose

Listener #3 (Center of Hall)

Figure 7a. Reflectogram Figure 7b. Sound Rose

Note the significant improvement over Cases 1 & 2

Figure 8. Sound Roses in Figures 5b, 6b, and 7b, suggest that the Lateral Fractions (LF) for this design are poor. Here we see poor LF for the rear half of the hall. This means there is little sense of envelopment there. The result in the Renovated Hall Layout A is worse.