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
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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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Magnetoactive acoustic metamaterials based on nanoparticle-enhanced diaphragm [PDF]
Scientific Reports, 2021 AbstractMagnetoactive membrane-type acoustic metamaterials are fabricated by coating a layer of magnetic nanoparticles on the polyethylene (PE) membranes and their vibration characters are investigated experimentally. From our experiments, we discovered that, under different magnetic fields by varying the distance between a magnet and the membranes ...
Xiaoxiao Tang +7 more
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Multiphysics Modeling of a Synthetic Jet Actuator in Operation
ActuatorsActive flow control is a promising technology for reducing noise, emissions, and power consumption in various applications. To better understand the performance of synthetic jet actuators, a computational model that couples structural mechanics with ...
Matthew G. M. Butler +2 more
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Externally induced low frequency tool chatter for optimizing the FSW weld of Al–SiC matrix
Discover Applied SciencesLinguistically synonymous, but from an engineer’s perspective vibration is a quantifiable value whereas chatter is a resultant reaction individual to the setup assembly, and is generated mostly during material removal processes in the form of audible ...
T. Madhavi +3 more
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Investigation of acoustic properties of rubber diaphragm
Sound & VibrationLarge amplitude and high damping play a crucial role in improving sound quality and low-frequency performance of loudspeakers, making it widely applied in electronic devices such as cellphones, tablets, and laptops. However, traditional moving-coil loudspeakers have poor damping performances, and the diaphragm of which is prone to fracture when a large
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A Biomimetic Tympanic Cavity PVDF Hydrophone for Low-Frequency Bioacoustic Monitoring in Marine Aquaculture. [PDF]
Sensors (Basel)Hou T, Piao Z, Wang Y, Xin Y.
europepmc +1 more source
Development and evaluation of a voice dataset for voice therapy exercises: quantitative audio analysis and user feedback from a cross-sectional study. [PDF]
Front Digit HealthSchröder SH +10 more
europepmc +1 more source