Results 101 to 110 of about 1,265,505 (345)
Chemical Thermodynamics and Thermal AnalysisThis study examines the molecular interactions between polyethylene glycol (PEG) at concentrations of 5%, 10%, and 15% with ethanol, utilizing ultrasonic techniques across temperatures of 25 °C, 35 °C, 45 °C, and 55 °C. Key acoustic parameters, including
Niharika Das +2 more
doaj +1 more source
Propagation of sound through the Earth's atmosphere. 1: Measurement of sound absorption in the air. 2: Measurement of ground impedance [PDF]
The fabrication of parts for the acoustic ground impedance meter was completed, and the instrument tested. Acoustic ground impedance meter, automatic data processing system, cooling system for the resonant tube, and final results of sound absorption in ...
Becher, J. +2 more
core +1 more source
Acoustic integrated extinction
, 2015 The integrated extinction (IE) is defined as the integral of the scattering cross-section as a function of wavelength. Sohl et al. [1] derived an IE expression for acoustic scattering that is causal, i.e.
Norris, Andrew N.
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Advanced Healthcare Materials, EarlyView.Cerebral organoids are transforming brain research, yet the field remains fragmented. This comprehensive systematic review maps 738 studies published between 2014 and 2024 to uncover trends, gaps, and opportunities across neuroscience. Introducing OrganoidMap—an interactive, open‐access platform to explore and compare models—this work enables ...
Anna Wolfram +10 more
wiley +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.
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Advanced Healthcare Materials, EarlyView.This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi +7 more
wiley +1 more source
Attenuation of sound in ducts with acoustic treatment: A generalized approximate equation [PDF]
A generalized approximate equation for duct lining sound attenuation is presented. The specification of two parameters, the maximum possible attenuation and the optimum wall acoustic impedance is shown to completely determine the sound attenuation for ...
Rice, E. J.
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Simplified Acoustic Impedance Measurements [PDF]
The Journal of the Acoustical Society of America, 1949 This paper describes an impedance measuring assembly consisting of a piston and pressure microphone arranged in such a manner that the ratio of the pressure to the particle velocity may be measured in both magnitude and phase at the surface of the piston. The assembly measures the driving point impedance at the surface of the piston.
openaire +1 more source
Real‐Time 3D Ultrasound Imaging with an Ultra‐Sparse, Low Power Architecture
Advanced Healthcare Materials, EarlyView.This article presents a novel, ultra‐sparse ultrasound architecture that paves the way for wearable real‐time 3D imaging. By integrating a unique convolutional array with chirped data acquisition, the system achieves high‐resolution volumetric scans at a fraction of the power and hardware complexity.
Colin Marcus +9 more
wiley +1 more source
Karakterisasi Reservoar "Febri-unila Field" Menggunakan Metode Acoustic Impedance (AI) Inversion [PDF]
, 2013 AI (Acoustic Impedance) adalah salah satu parameter fisis batuan yang nilainya dipengaruhi oleh tipe litologi, porositas, kandungan fluida, kedalaman tekanan dan temperatur.
Kartika, F. (Febrina)
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