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Acoustical shells were developed to focus sound outward in one direction as opposed to the ″sound in the round″ diffused from all sides of the open gazebo bandstand. In the United States they were built in large city parks and amusement parks as bands increased in size.
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Rectangular pavilions with enclosed shell and stage like the example pictured in Boise, Idaho were in use after 1900. These proved very effective as outdoor performing venues, and many are still in use.
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Free−standing outdoor shells in a variety of styles were built starting in the 1890s. Professional architects were often employed to design them with varying degrees of acoustical success. The
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An image of the Lake
Braddock Symphony Orchestra performing at District IX Festival, on March 18, 2006, at
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Often shells are designed to be removable, either rolling away on wheels or lifting into a
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in San Luis Potosí, Mexico. It is now located in the parking lot of a restaurant
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