Results 61 to 70 of about 164,663 (289)
Experimental realization of extraordinary acoustic transmission using Helmholtz resonators
AIP Advances, 2015 The phenomenon of extraordinary acoustic transmission through a solid barrier with an embedded Helmholtz resonator (HR) is demonstrated. The Helmholtz resonator consists of an embedded cavity and two necks that protrude, one on each side of the barrier ...
Brian C. Crow +4 more
doaj +1 more source
FEM Investigation of a Multi-Neck Helmholtz Resonator
Applied Sciences, 2023 An increasingly significant area of research with several applications in numerous disciplines is that of multi-neck Helmholtz resonators. This research is set to explore the accuracy and applicability of the finite element method (FEM) for the ...
Nikolaos M. Papadakis +1 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Near‐surface deuterium enrichment profiles for different microstructural types of TiAl after exposure at 700 °C in a heavy water‐containing environment. The deuterium levels are significantly higher than expected from natural occurrence, indicating that the heavy water dissociated during the exposure treatment and entered the specimens.
Jonathan D. H. Paul +5 more
wiley +1 more source
Numerical study on transient response of the bowed string
Mechanical Engineering JournalThis study focuses on the transient response in a bowed string with the stick-slip vibration for the clear understanding of its behavior and tone at the beginning of playing.
Miwa SUEDA +5 more
doaj +1 more source
Shock and Vibration, 2022 Self-excited oscillating pulsed cavitation jet has many advantages, such as easy operation, simply maintenance, and low investment costs. Based on the structural parameters of the traditional Helmholtz and organ pipe single-chamber self-excited ...
Dongyan Shi +3 more
doaj +1 more source
Analysis of the Shifted Helmholtz Expansion Preconditioner for the Helmholtz Equation
, 2018 We study in this paper the so-called expansion preconditioner which is a generalization of the shifted Helmholtz preconditioner. We show that this preconditioner can reduce the number of GMRES iterations if the meshsize is small enough and the shift is at most of the size of the wavenumber.
Cocquet, Pierre-Henri, Gander, Martin
openaire +3 more sources
Advanced Engineering Materials, EarlyView.Additive manufacturing introduces pronounced microstructural and crystallographic anisotropy in Ni‐based superalloys, resulting in orientation‐dependent creep deformation and damage. This review identifies the key microstructural origins of creep anisotropy, examines their influence on dominant deformation mechanisms, and highlights processing ...
Chandan Kumar +3 more
wiley +1 more source
Noise filter using a periodic system of dual Helmholtz resonators
Scientific ReportsThis study investigates noise reduction using a periodic arrangement of dual Helmholtz resonators and explores the introduction of defects within this periodic structure. The transfer matrix method was employed to carry out theoretical research.
Mohamed El Malki +3 more
doaj +1 more source
Abstract and Applied Analysis, 2022 The ill-posed Helmholtz equation with inhomogeneous boundary deflection in a Hilbert space is regularized using the divergence regularization method (DRM).
Benedict Barnes +2 more
doaj +1 more source
The Ophthalmoscope: Helmholtz’s Augenspiegel [PDF]
European Neurology, 2009 The origins of Helmholtz’s invention of the ophthalmoscope are found in the ancient observation that the back of the eye appeared black. In 1703, Jean Méry reported that the luminosity of the cat’s eye could be seen when the animal was held under water, and Mariotte observed that a dog’s eye was luminous but erroneously thought this was because its ...
openaire +2 more sources