Abstract
The historic Ford Amphitheatre in Hollywood, CA, recently completed an overall renovation and expansion. The centerpiece is the 1,200-seat outdoor amphitheater, which features a dramatic arroyo backdrop. The side walls, rear wall, towers, and house flooring were built of concrete in 1931 after a brush fire destroyed the original 1920 wood structure. Several sound-absorptive treatments had been applied to the walls over the years previous to our involvement, but excessive reverberation and some anomalous reflections remained. The new design features an expanded “sound wall” that helps to mitigate highway noise while providing optimal lighting and control positions, and offering an opportunity to improve the acoustical treatment scheme. The result is a unique installation of decorative perforated-metal panels that tame the reverberation, especially in the low frequencies. Assorted design challenges, apparent arroyo hillside contributions, and the resultant reverberation will be discussed.
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