... 24 05 2011 01 06 2011 28 12 2011 28 12 2011 acoustic impedance acoustic wave absorption boundary-elements methods finite element analysis shells (structures) structural acoustics underwater sound vibration control vibrations FRF coupled FE/BE method...

... reduction performance of the void decoupling layer. 21 07 2009 07 06 2010 16 09 2010 16 09 2010 acoustic impedance acoustic noise acoustic wave absorption acoustic wave transmission noise abatement plates (structures) structural acoustics underwater acoustic propagation...

... a known acoustic response from a given PZT-driven baffled plate, is accomplished using the impedance method. A dynamic model that assembles the PZT patch impedance, the host structure impedance, and the acoustic impedance is developed and then is utilized to synthesize a predesignated acoustic response...

... acoustics vibration control vibrations acoustic impedance shells (structures) To expand the applications of dynamic absorbers, extensive studies have been directed to generalizing the theory to apply to multi-degree-of-freedom structures or continuous structures, such as beams, plates...

... in the design of stable controllers. This idea is applicable to the acoustic impedance of ANC devices that is not necessarily PR. A controller may inject energy into a noise field if its fixed parameters do not match the varying parameters of the noise field. Resonators are important noise control devices...

... , “ Acoustic Impedance of a Finite Length Duct With Dynamic Termination ,” J. Acoust. Soc. Am. 0001-4966 10.1121/1.402810 , 91 , pp. 3575 – 3578 . Okamoto , Y...

...Kevin M. Farinholt; Donald J. Leo Acoustic modeling and control of conical enclosures with an actuator boundary condition is presented. Acoustic impedances are coupled with electrical and mechanical actuator dynamics to generate a coupled state-space model of the system. Analysis of the acoustic...

... 2002 12 06 2002 acoustic wave absorption acoustic wave reflection porous materials surface acoustic waves differential equations acoustic materials acoustic impedance architectural acoustics The use of corrugated or ridgy absorbent surfaces usually presents two major...

.... In other words, the terminal acoustical impedances were assumed to be locally reacting, and constant over the cross section. • Shear diaphragm end conditions were assumed for the shell. As this implies that the ends do not transmit moments, this is similar to assuming simply supported ends for a beam...