| 摘要 |
A multiplicity of sound modules are mounted on a number of baffle plates which define an essentially continuous surface, e.g., a ceiling. Each sound module consists of a loudspeaker and a cavity-defining member which may be a thin-walled shell or a rectangular block of lightweight material, e.g., foamed polystyrene. The cavities are preferably spherical and of equal size, and the loudspeakers are preferably identical and electrically interconnected for simultaneous reproduction of a common input signal.
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