Results 41 to 50 of about 1,129,305 (370)

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, Motoki Sasaki, Kazutaka Yamada, Nobuhiro Miki, Natsuki Matsui, Takashi Matsuishi   +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, Xiao Zhang, Zegang Ju, Jiang Zhao, Man Hu, Mingyuan Gao, Jun Luo, Huayan Pu   +7 more
doaj   +1 more source

Acoustic prediction of sediment impedance [PDF]

The Journal of the Acoustical Society of America, 1994
The Naval Research Laboratory has been developing a normal-incidence, high-frequency (15–30 kHz), narrow beamwidth (6°–12°), high-resolution (≳92-dB dynamic range) seismic system with the capability to predict, in near real time, acoustic impedance of the upper several meters of the seafloor using inversion techniques.
John C. Cranford, Niall C. Slowey, William R. Bryant, Douglas N. Lambert, Donald J. Walter   +4 more
openaire   +2 more sources

Acoustic impedance of micro-perforated panels in a grazing flow.

Journal of the Acoustical Society of America, 2019
Micro-perforated panels (MPPs) are widely used for broadband sound absorptions. For a MPP exposed to a grazing flow, existing acoustic impedance formulas based on different flow parameters give inconsistent results, thus calling for a systematic ...
Xiaoqi Zhang, Li Cheng
semanticscholar   +1 more source

On Wave Impedance and Specific Impedance of Materials in Acoustics [PDF]

The Journal of the Acoustical Society of America, 1956
If impedance is defined as an operator that permits one to go from an “effect” back to a “cause” (in hydrodynamics, from velocity to pressure), it is seen that the impedance field of a wave is constant in the case of a plane wave, but only in this case.
Gaston Laville, Théodore Vogel
openaire   +2 more sources

Systematic profiling of cancer‐fibroblast interactions reveals drug combinations in ovarian cancer

Molecular Oncology, EarlyView.
Fibroblasts, cells in the tumor environment, support ovarian cancer cell growth and alter morphology and drug response. We used fibroblast and cancer cell co‐culture models to test 528 drugs and discovered new drugs for combination treatment. We showed that adding Vorinostat or Birinapant to standard chemotherapy may improve drug response, suggesting ...
Greta Gudoityte, Osheen Sharma, Laura Leuenberger, Emelie Wallin, Josefin Fernebro, Päivi Östling, Rebecka Bergström, Johan Lindberg, Ulrika Joneborg, Olli Kallioniemi, Brinton Seashore‐Ludlow   +10 more
wiley   +1 more source

Lithological Study of Mishrif, Rumaila, Ahmadi and Mauddud Formations Using Vp/ Vs Ratio, Acoustic Impedance and Well Logging at Amara Oil Field, Southern Iraq

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
doaj   +1 more source

Understanding and measuring mechanical signals in the tumor stroma

FEBS Open Bio, EarlyView.
This review discusses cancer‐associated fibroblast subtypes and their functions, particularly in relation to extracellular matrix production, as well as the development of 3D models to study tumor stroma mechanics in vitro. Several quantitative techniques to measure tissue mechanical properties are also described, to emphasize the diagnostic and ...
Fàtima de la Jara Ortiz, Chiara Cimmino, Maurizio Ventre, Alessandra Cambi   +3 more
wiley   +1 more source

Theoretical research on the application of impedance calculation in the design of high-intensity low-frequency acoustic generator

Journal of Low Frequency Noise, Vibration and Active Control
The impedance matching is essential in producing high-intensity acoustic waves. This paper studies the impedance calculation methods of modulators and double-chamber Helmholtz resonators based on fluid mechanics, aeroacoustics, and electro-acoustic ...
Baoguo Zhang, Mingrong Dong, Xubin Liang, Min Zhang, Tianqing Zhao, Bin He, Deyu Sun   +6 more
doaj   +1 more source

Determining acoustical directionality in an impedance tube using multiple fixed microphones [PDF]

, 2011
Acoustic impedance of a port or object is a valuable piece of knowledge describing how well sound is transmitted or reflected. The commonly used slotted-line method is labourious and time consuming, requiring manual movement to find the maxima and minima
Bodman, Kerry, Pennington, Kyle, Scott, Jonathan B.   +2 more
core   +1 more source