Results 11 to 20 of about 109,007 (299)
Design and experimental evaluation of a travelling wave thermoacoustic engine
Energy Reports, 2020 In a thermoacoustic engine, acoustic impedance plays a key role to improve the system performance. A matching stub is a component which can be applied to adjust the acoustic impedance.
Patcharin Saechan, Isares Dhuchakallaya
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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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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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International Journal of Environmental Health Engineering, 2023 Introduction: In addition to having auditory effects, sound also has nonauditory effects. Acoustic Annoyance is one of the nonauditory effects of sounds which are construed as psychoacoustic characteristics.
Zahra Amini +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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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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Journal of Natural Fibers, 2022 Natural fiber-based hybrid composites have been explored in this study as possible structural materials. Detailed investigation of sound insulation property of a series of hybrid and nonhybrid composites has been carried out using impedance tube having ...
Vikas Kumar Singh, Samrat Mukhopadhyay
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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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Influence of Fabric Folding Geometry on the Sound Absorption
Journal of Natural Fibers, 2022 Textile materials used without any other structures show low absorption throughout the operating frequency range, and they are currently used for interior decoration.
Roberto Atiénzar-Navarro +4 more
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