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Acoustic impedance-based surface acoustic wave chip for gas leak detection and respiratory monitoring [PDF]
Communications EngineeringAcoustic impedance enables many interesting acoustic applications. However, acoustic impedance for gas sensing is rare and difficult. Here we introduce a micro-nano surface acoustic wave (SAW) chip based on the acoustic impedance effect to achieve ultra ...
Baile Cui +7 more
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Modelling Turbine Acoustic Impedance [PDF]
International Journal of Turbomachinery, Propulsion and Power, 2021 We quantify the sensitivity of turbine acoustic impedance to aerodynamic design parameters. Impedance boundary conditions are an influential yet uncertain parameter in predicting the thermoacoustic stability of gas turbine combustors.
James Brind, Graham Pullan
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A Review of Acoustic Impedance Matching Techniques for Piezoelectric Sensors and Transducers [PDF]
Sensors, 2020 The coupling of waves between the piezoelectric generators, detectors, and propagating media is challenging due to mismatch in the acoustic properties. The mismatch leads to the reverberation of waves within the transducer, heating, low signal-to-noise ...
Vivek T. Rathod
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Acoustic impedance extraction method and acoustic characteristics analysis of perforated plates under grazing flow [PDF]
Journal of Low Frequency Noise, Vibration and Active Control, 2023 As an important component of inlet and exhaust mufflers, the acoustic characteristics of perforated components are inevitably affected by the flow of air. Therefore, obtaining the acoustic impedance of the perforated element under airflow conditions is a
Huabing Wen +3 more
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Iraqi Geological Journal, 2021 The lithology of four formations from the Cretaceous period (Mishrif, Rumaila, Ahmadi, and Mauddud) was evaluated using the Acoustic Impedance and Vp/Vs ratio cross plot from Rock Physics Templates.
Hiba Tareq
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Generalized acoustic impedance metasurface
Communications PhysicsImpedance theory has become a favorite method for metasurface design as it allows perfect control of wave properties. However, its functionality is strongly limited by the condition of strict continuity of normal power flow.
Yu-Ze Tian +3 more
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The influence of impedance mismatch of the medium with gradient change of impedance on acoustic characteristics [PDF]
MATEC Web of Conferences, 2019 Medium with gradient change of acoustic impedance is a new type acoustic structure. It is composed of several materials and has a continuous gradient composition and structure whose specific acoustic impedance varies smoothly across the layer.
Hu Bo, Wang Moran, Du Yimei
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Acoustic impedance of orifices with grazing flow [PDF]
MATEC Web of Conferences, 2020 The paper presents an overview of the results of studies of acoustic impedance of orifices with grazing airflow. Empirical models of orifice impedance, which take into account the grazing flow, and the existing methods of measuring the acoustic impedance
Bejsenbaeva Diana +3 more
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JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2020 This research ilustrate the generation of acoustic impedance inversion in the absence of well log using stacking velocity input in Salawati Basin, Papua, Indonesia using data obtained from seismic lines and stacking velocity section.
Handoyo +2 more
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