Results 21 to 30 of about 96,792 (346)
JGE, 2020 Analysis of the physical properties of the sandstone reservoir in this study was carried out using the acoustic impedance inversion method and seismic multi-attribute which was carried out at the Bonaparte Basin "MNF" Field.
Muhammad Niko Febridon +2 more
doaj +1 more source
Acoustic Energy Harvesting of Piezoelectric Ceramic Composites
Energies, 2022 Acoustic energy is an often overlooked but increasingly prevalent source of ambient energy that could be scavenged to power a wide range of devices. Piezoelectric materials are often used, but the tradeoff between acoustic impedance matching and the ...
Jose Figueroa, Margo Staruch
doaj +1 more source
Journal of Petroleum Exploration and Production Technology, 2019 Structural interpretation and inversion analysis were used to characterize hard-to-image reservoirs, to predict subsurface interwell reservoir properties for optimum reservoir heterogeneity description, and to fine-tune drilling locations in ‘DJ’ Field ...
Ayodeji Alabi, Pius Adekunle Enikanselu
doaj +1 more source
Improving APT Systems’ Performance in Air via Impedance Matching and 3D-Printed Clamp
Sensors, 2023 This paper presents a study on improving the performance of the acoustic piezoelectric transducer system in air, as the low acoustic impedance of air leads to suboptimal system performance.
Liu Liu, Waleed Abdulla
doaj +1 more source
Machines, 2022 In order to apply the nonlinear energy sink (NES) to reduce the low-frequency noise inside a 3D acoustic cavity with an impedance boundary, a two degrees-of-freedom (DOF) dynamic model of the coupled system of one damped acoustic mode of a regular 3D ...
Jianwang Shao +3 more
doaj +1 more source
Measurement of Acoustic Impedance [PDF]
The Journal of the Acoustical Society of America, 1939 Apparatus developed for determining acoustic impedance will be described and demonstrated. The device is the acoustical equivalent of an electrical transmission line.
R. D. Fay, W. M. Hall
openaire +1 more source
ResearchImpedance metasurfaces enable accurate regulation of acoustic fields. However, they can hardly supply a flexible response as such perfect operation is accompanied by stringent requirements on the design of unit cells.
Yu-Ze Tian +4 more
doaj +1 more source
Click emission in Dall's porpoise Phocoenoides dalli, focusing on physical properties of tissues. [PDF]
PLoS ONE, 2018 Dall's porpoise (Phocoenoides dalli) is one of most common North Pacific porpoise species, for which information on sound-emitting processes is limited.
Mika Kuroda +5 more
doaj +1 more source
Ultra-Broadband Sound Absorbing Materials Based on Periodic Gradient Impedance Matching
Frontiers in Materials, 2022 Ultra-broadband sound absorption with periodic gradient impedance matching is of great concern in the research of acoustic materials. This study investigates the impedance matching of composite acoustic metamaterials comprising micro-perforated plates ...
Fei Wu +7 more
doaj +1 more source
Impact tolerant material [PDF]
, 1990 A material is protected from acoustic shock waves generated by impacting projectiles by means of a backing.
Heyman, Joseph S.
core +1 more source