The Design of Systems to Control Actively Periodic Sound Transmission Into Enclosed Spaces, Part I: Analytical Models

✍ Scribed by S.D. Snyder; C.H. Hansen

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 587 KB
• Volume: 170
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1994.1077

✦ Synopsis

The physical arrangement of an active noise control system (control sources and error sensors) limits the maximum levels of sound attenuation which can be achieved under ideal conditions. This paper presents a theoretical framework suitable for aiding in the design of feedforward active systems to control sound transmission into coupled enclosures. The analytical models are formulated by using modal coupling theory, and as such can be readily applied to a variety of sound transmission problems. A variety of error criteria are used as the basis of model formulation such as minimization of acoustic potential energy in the enclosure, minimization of acoustic pressure amplitude at a discrete location, and minimization of structural kinetic energy. In the companion paper (part II [1]) these models are used to illustrate physical control mechanisms and the effect of design variables on system performance.