... performance in a higher frequency region. multichamber hybrid muffler four-pole transfer matrix method back pressure GA method acoustic noise genetic algorithms reliability silencers 09 11 2010 28 09 2011 18 01 2012 18 01 2012 References 1 Morse , P. M...

... contributions of noise and vibration, with active techniques of the active structural acoustic control (ASAC) [( 1 )], which appear to be the only way to reduce the low frequency components. active sandwich panels multiphysics vibroacoustics poroelasticity piezoelectricity acoustic noise...

... performance during live scans. The controller produced an overall reduction of 10.6 dBA across the full audible spectrum. 04 10 2010 01 06 2011 09 01 2012 09 01 2012 acoustic noise acoustic transducers acoustic wave absorption active noise control biomedical equipment...

...Gary Koopmann; Ulf Michel 06 09 2011 22 11 2011 08 12 2011 08 12 2011 acoustic intensity measurement acoustic noise aeroacoustics fans microphones pipe flow turbomachinery vibrations Wolfgang Neise, renowned for his life-long contributions to advancing...

... 28 11 2011 28 11 2011 acoustic field acoustic intensity acoustic noise aeroacoustics ducts jets nozzles Sound emission jet noise ducted exhaust The acoustic loads in a launch vehicle environment arising from supersonic turbulent exhaust jets of rocket engines...

... 10 2011 acoustic noise acoustic signal processing propellers ships structural acoustics A ship’s radiated acoustic signature is known after an acoustic range measurement. However, it continually evolves and changes. Machinery becomes out-of-balance, degrades, is upgraded...

... actuators. 18 06 2010 01 02 2011 31 08 2011 20 09 2011 acoustic field acoustic noise acoustic waves aeroacoustics aerospace components aircraft boundary-elements methods noise abatement piezoelectric actuators propellers Interior cabin noise is a challenging...

.... , 1999 , “ Vibroacoustic Analysis of a Finite Cylindrical Shell With Internal Floor Partition ,” J. Sound Vib. 0022-460X , 226 ( 1 ), pp. 101 – 123 . 10.1006/jsvi.1999.2278 21 04 2010 27 02 2011 31 08 2011 20 09 2011 acoustic intensity measurement acoustic noise...

... and their interactions with the launch pad (see Figs. 1 2 ). acoustic field acoustic intensity acoustic noise aeroacoustics boundary integral equations inverse problems space vehicles time-domain analysis 02 11 2008 11 06 2010 22 03 2011 22 03 2011 Effects...

... 04 03 2010 08 10 2010 08 10 2010 acoustic noise damping engines silencers Perforated tubes are commonly found inside automotive mufflers. They are used to confine the mean flow in order to reduce the back-pressure to the engine and the flow generated noise inside...

... 09 2009 27 04 2010 08 10 2010 08 10 2010 acoustic noise finite element analysis piezoelectric materials resins structural acoustics vibrations low-frequency noise reduction multiphysics modeling active structural acoustic control Effective noise reduction...

... 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...

... called a Helmholtz model or method full computational fluid dynamics (CFD) unsteady simulation in 3D space acoustic noise acoustic waves compressors finite difference methods Fourier transforms Helmholtz equations vibrations 2010 American Society of Mechanical Engineers ...

... technique acoustic noise acoustic resonance aeroacoustics pipe flow silencers simulated annealing 01 11 2009 16 03 2010 26 08 2010 26 08 2010 The STL with respect to frequencies at various mufflers (targeted tone: 800 Hz) By using the formulas of Eq. 9...

... the performance of the overall system. Corner frequencies of the combined system ( a ) ξ 1 = ξ 2 = 0 ( b ) ξ 1 = ξ 2 = 0.1 20 10 2008 19 05 2009 20 11 2009 20 11 2009 acoustic noise scanning probe microscopy vibration isolation...

... and Breakdown: Survey and Extension ,” AIAA J. 0001-1452 , 22 , pp. 1192 – 1206 . 10.2514/3.8761 18 03 2008 21 07 2009 18 11 2009 18 11 2009 acoustic emission acoustic noise aeroacoustics blades fans rotors One of the key parameters to be considered...

... to the component and subsequently excited into vibration. The hull vibration causes discomfort within the ship and increases interior and radiated noise levels. marine vehicles vibrations vibration control noise abatement acoustic noise 27 01 2006 05 07 2006 The test hydrofoil...

...-3717 , 107 , pp. 282 – 290 . Genta , G. , 1999 , Vibration of Structures and Machines: Practical Aspects , Springer , New York . 02 09 2004 03 02 2006 belts drives power transmission (mechanical) vibrations acoustic noise shear deformation fatigue...

... silencers exhaust systems aeroacoustics vibrations acoustic noise noise abatement diesel engines The higher and higher penetration of diesel engines in the passenger car market is due to their higher efficiency and, thereby, reduced fuel costs. Although diesel engines are favorable in terms...

... acoustic noise noise abatement vibrations machine bearings rotors stators Rieger N.F. , 1986 , Balancing of Rigid and Flexible Rotors , The Shock and Vibration Information Center, United States Department of Defense. Wilcox J.B. , 1967 , Dynamic Balancing of Rotating...