..., Inc ., Pawtucket, Rhode Island, USA. 38 Fahy , F. , and Gardonio , P. , 2007 , Sound and Structural Vibration: Radiation, Transmission and Response , Academic Press , New York. 09 07 2010 24 05 2011 01 06 2011 28 12 2011 28 12 2011 acoustic...

... 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...

... is cancelled. 21 05 2004 01 11 2006 structural acoustics vibration control vibrations acoustic impedance shells (structures) Dynamic absorbers are passive vibration control devices that when attached to host structures, extract a portion of their vibrational energy. Since...

... impedance of the duct is Z o = ρ o c o ∕ A o , which is the specific acoustic impedance ρ o c o normalized by A o . Let P x and U x denote, respectively, the acoustic pressure and acoustic velocity measured x meters away from the source...

... ( 8 ). Acoustic impedances of actively controlled ducts were investigated by Kim and Prasad ( 9 ). Active side-branch resonators were applied to noise control in ducts by Okamoto et al. ( 10 ) and Utsumi ( 11 ). All these methods generate...

...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...

... acoustic noise noise abatement flexible structures resonance acoustic impedance structural acoustics In many practical piping systems used to transport fluids, a flexible element is introduced to reduce vibrations transmitted along the pipe walls. This element also affects the pressure...