Certainly, the Concert Hall's acoustic is very complex and can not cover more than simple speculation. In short, Schroeder developed pursuant to the spread of sound the human ear to listen for 
 Be a great help, and in 1975 published quadratic residue diffuser paper, from the interior acoustic space into a new era of treatment. By 1983, the Naval Resear 
 ch Laboratory of specialization serving diffraction physicist Peter D 'A ntonio created the RPG company to begin mass production to more than the number of secondary spread of the sound based on the theory 
 Wave diffusion plate, and extended to the recording studio and sound room, RPG company's products and the diffusion theory of quadratic residue gradually accepted by the public ...... Contact: Xue-Wei Liu welcomed the cooperation; Phone: Email: 
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