Results 271 to 280 of about 109,970 (304)

Rapid impedance tube determination of fabric transparency

The Journal of the Acoustical Society of America, 2017
Acousticians are continually being asked to verify fabric transparency for applications with absorptive and diffusive surfaces, as well as in sound reinforcement. Standard reverberation chamber methods can be used, but require large fabric and fiberglass samples.
Peter D'Antonio, Trevor J. Cox
openaire   +1 more source

Acoustic impedance measurements of pulse tube refrigerators

Journal of Applied Physics, 2010
Complex acoustic impedance is determined in a prototype refrigerator that can mimic orifice-type, inertance-type, and double inlet-type pulse tube refrigerators from simultaneous measurements of pressure and velocity oscillations at the cold end. The impedance measurements revealed the means by which the oscillatory flow condition in the basic pulse ...
Takashi Iwase, Tetsushi Biwa, Taichi Yazaki   +2 more
openaire   +1 more source

ACCURATE LOW FREQUENCY IMPEDANCE TUBE MEASUREMENTS

See it Hear!, 2023
R OLDFIELD, F BECHWATI
openaire   +1 more source

Multi microphone extension of impedance tube systems

Das Impedanzmessrohr ist ein weit verbreitetes Messsystem für die Bestimmung akustischer Materialeigenschaften. Dieses erfordert jedoch hoch genaue akustische Messhardware. In der vorliegenden Arbeit soll diese Art von Messungen durch die Verwendung günstiger Komponenten zugänglicher gemacht werden.
Huber, Felix Robert, Kraxberger, Florian, Toth, Florian   +2 more
openaire   +1 more source

Human neural tube morphogenesis in vitro by geometric constraints

Nature, 2021
Eyal Karzbrun, Stella M K Glasauer, Yofiel Wyle   +2 more
exaly  

A receptor–channel trio conducts Ca2+ signalling for pollen tube reception

Nature, 2022
Qi-Fei Gao, Chao Wang, Legong Li
exaly  

Factors impeding enteral tube feedings

Critical Care Medicine, 1999
openaire   +1 more source

Multi‐Mode Water‐Tube‐Based Triboelectric Nanogenerator Designed for Low‐Frequency Energy Harvesting with Ultrahigh Volumetric Charge Density

Advanced Energy Materials, 2021
Hao Wu, Zuankai Wang, Yunlong Zi
exaly  

A Vacuum Tube Impedance Bridge

Journal of the Optical Society of America, 1929
openaire   +1 more source

Modeling neural tube development by differentiation of human embryonic stem cells in a microfluidic WNT gradient

Nature Biotechnology, 2020
Pedro Rifes, Oliver Knights Møller, Guido Barzaghi   +2 more
exaly