Results 11 to 20 of about 109,970 (304)
Materials Research Letters, 2022 We developed a sound absorber using a magnetorheological fluid(MR-F) based on the density and alignment angle of carbonyl iron powder(CIP) chains by the controlling the magnetic field strength and direction.
Hao Cheng +3 more
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A comparison between hybrid method technique and transfer matrix method for design optimization of vehicle muffler [PDF]
FME Transactions, 2021 Hybrid mufflers are now commonly equipped to decrease vehicle noise and are a crucial tool for regulation of the acoustic system. In order to ensure optimum engine efficiency, the system is intended to dump the strength of the acoustic pulses generated ...
Mohamad Barhm +3 more
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Effects of intermediary reservoir in a two-stage impedance pump
MATEC Web of Conferences, 2017 Impedance pump is a simple valve-less pumping mechanism, which transport fluid through the mismatch of impedance in the system. A typical open-loop impedance pump consists of an elastic tube, connected to rigid tubing, where the rigid section is ...
Lee V. C.-C., Chong J.-C
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An assessment of the performance of impedance tube method [PDF]
, 2014 The impedance tube method is widely used for measuring sound absorption (or reflection) coefficients of acoustic materials as a function of frequency.
Körük, Hasan
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Computational studies of resonance wave pumping in compliant tubes [PDF]
, 2008 The valveless impedance pump is a simple design that allows the producion or amplification of a flow without the requirement for valves or impellers. It is based on fluid-filled flexible tubing, connected to tubing of different impedances.
Avrahami, Idit, Gharib, Morteza
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A frequency-response-based method of sound velocity measurement in an impedance tube [PDF]
, 2017 A stable and accurate new method for the measurement of the velocity of sound is proposed. The method is based on the characteristics of the frequency response measured at different positions in an impedance tube and it eliminates adverse effects caused ...
Thomas, P. J. (Peter J.) +2 more
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A valveless micro impedance pump driven by electromagnetic actuation [PDF]
, 2005 Over the past two decades, a variety of micropumps have been explored for various applications in microfluidics such as control of pico- and nanoliter flows for drug delivery as well as chemical mixing and analysis.
Gharib, Morteza +2 more
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DYNAMICS OF FLUID IN OSCILLATORY FLOW: THE Z COMPONENT [PDF]
Journal of Engineering Science and Technology, 2015 In an oscillatory flow, the resistance to flow, more appropriately defined as the impedance to flow, is a function of oscillating frequency, which refers to the harmonic composition of the driving pressure wave. Flow in an elastic tube may be resisted in
V. C. -C. LEE, Y. A. ABAKR, K. -C. WOO
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Impedance of finite length resistive cylinder
Physical Review Special Topics. Accelerators and Beams, 2004 We determine the impedance of a cylindrical metal tube (resistor) of radius a, length g, and conductivity σ attached at each end to perfect conductors of semi-infinite length.
S. Krinsky +2 more
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Jute Felt for Noise Reduction: Understanding Effect of Pore Size Distribution
Journal of Natural Fibers, 2022 Effect of pore size and its distribution on the noise reduction coefficient of jute felt were studied through capillary flow porometer and impedance tube.
Gautam Basu +4 more
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