Structure-borne noise control

R. D. Berendt and G. E. Winzer, Al Guide to Airborne, Impact, and Structure Borne Noise Control in Multifamily Dwellings, U.S. Department of Housing and Urban Development, Washington, D.C., 1963. 

Active structural acoustic control (ASAC) Reduced structure-borne noise and sound emission/imission, increased passengers comfort, weight reduction, interior sound design... 

Active Damping and Reduction of Structural Oscillations. Under this heading, the research groups develop fundamental concepts of optimized positioning and integrating adaptronic components (actuators, sensors) in machine tool structures. Research focuses on approaches and implementations that will reduce structure-born noise by means of control techniques. 

Vibration and noise generated automotive structures can be reduced by a number of means, broadly classified into active, passive, and semi-active. Of special interest to this study are the passive control (i.e. absorption) methods of air-borne noise which is traditionally achieved by the use of poroelastic materials in the vehicle s dash panels, door panels, floor panels, wheelhouses, cargo bays, roof panels and upper cowl. However, the use of the traditional acoustic materials in sound absorption panels is usually accompanied by a significant increase of the overall vehicle s weight... 

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