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Active noise control systems : secondary source arrangements, frequency shaping, and electroacoustic path modeling
(Northern Illinois University, 1993)
Active noise control has been the subject of considerable research in recent years. A large portion of this work has been directed toward the active control of noise in ducts because of potential widespread industrial ...
Vibrations of a yangqin soundboard
(Northern Illinois University, 1991)
The yangqin is a Chinese hammered dulcimer with a trapezoidal soundboard. The soundboard, which is crowned to a height of 4 cm in the center, is supported by 7 unequally-spaced transverse ribs. Vibrational modes of the ...