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Experimental and numerical study of Conoscopic Interferometry sensitivity for optimal acoustic pulse detection in ultrafast acoustics [PDF]
Photoacoustics, 2023 Conoscopic interferometry is a promising detection technique for ultrafast acoustics. By focusing a probe beam through a birefringent crystal before passing it through a polarizer, conoscopic interferences sculpt the spatial profile of the beam.
Martin Robin +5 more
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Performance Research and Optimization of Sound Insulation Hood of Air Compressor Unit
Applied Sciences, 2021 The noise control of a compressor has always been a hot spot in the field of industrial application. In this paper, the air inlet structure of the sound insulation hood of an air compressor unit was studied and improved. Acoustic finite element numerical
Huagen Wu +5 more
doaj +1 more source
Sensors, 2021 Respiratory activity is an important vital sign of life that can indicate health status. Diseases such as bronchitis, emphysema, pneumonia and coronavirus cause respiratory disorders that affect the respiratory systems.
Uduak Z. George +2 more
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Ultraminiature AlN diaphragm acoustic transducer [PDF]
Applied Physics Letters, 2020 Piezoelectric acoustic transducers consisting of a circular aluminum nitride and silicon nitride unimorph diaphragm and an encapsulated air-filled back cavity are reported. Analytical and finite element analysis models are used to design the transducer to achieve low minimum detectable pressure (MDP) within chosen size restrictions.
Alison E. Hake +3 more
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The Fabrication and Indentation of Cubic Silicon Carbide Diaphragm for Acoustic Sensing [PDF]
Micromachines, 2021 In this study, 550 nm thick cubic silicon carbide square diaphragms were back etched from Si substrate. Then, indentation was carried out to samples with varying dimensions, indentation locations, and loads. The influence of three parameters is documented by analyzing load-displacement curves.
Siti Aisyah Zawawi +3 more
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Modeling and Compensation of Nonlinear Distortion in Horn Loudspeakers [PDF]
, 1994 Horn loaded compression drivers are widely used in the area where high sound pressure levels together with good directivity characteristics are needed. Major disadvantage of this kind of drivers is the considerable amount of nonlinear distortion.
Berkhoff, Arthur P. +3 more
core +9 more sources
Developing and evaluating a hybrid wind instrument [PDF]
, 2014 A hybrid wind instrument generates self-sustained sounds via a real-time interaction between a computed excitation model (such as the physical model of human lips interacting with a mouthpiece) and a real acoustic resonator.
Buys, Kurijn, Laney, Robin, Sharp, David
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Travelling-wave thermoacoustic electricity generator using an ultra-compliant alternator for utilization of low-grade thermal energy [PDF]
, 2012 This paper proposes a novel concept of a travelling-wave thermoacoustic electricity generator, which employs a looped-tube travelling-wave thermoacoustic engine to convert thermal energy into acoustic power, an ultra-compliant alternator within the ...
Backhaus, S., Jaworski, A.J., Yu, Z.
core +1 more source
The focusing of weak shock waves [PDF]
, 1976 This paper reports an experimental investigation, using shadowgraphs and pressure measurements, of the detailed behaviour of converging weak shock waves near three different kinds of focus.
Kulkarny, V. A., Sturtevant, B.
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A Grating Interferometric Acoustic Sensor Based on a Flexible Polymer Diaphragm
Sensors, 2023 This study presents a grating interferometric acoustic sensor based on a flexible polymer diaphragm. A flexible-diaphragm acoustic sensor based on grating interferometry (GI) is proposed through design, fabrication and experimental demonstration. A gold-coated polyethylene terephthalate diaphragm was used for the sensor prototype.
Linsen Xiong, Zhi-mei Qi
openaire +3 more sources