Results 31 to 40 of about 1,130 (256)
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
The PRIMA Thesaurus for Materials Science and Engineering
Advanced Engineering Materials, EarlyView.The PRIMA Thesaurus is a structured vocabulary designed to improve how materials science data is described and shared. Developed with input from multiple experts, it enables clear documentation of research workflows, data exchange, and reuse across platforms.
Rossella Aversa +8 more
wiley +1 more source
Advanced Functional Materials, EarlyView.A mechanically programmable hydrogel for tissue engineering is developed by modulating the molecular threading density of poly(ethylene glycol) diacrylate‐β‐cyclodextrin (PEGDA‐β‐CD) polyrotaxane and combining it with β‐CD‐modified gelatin. The polyrotaxane‐guided transition from disordered pores to laminar microstructures enables precise tuning ...
Shiyi Chen +10 more
wiley +1 more source
Reduction of ear-position sound pressure at low speed in electric vehicles by pulp mold (Translated)
Mechanical Engineering JournalElectric vehicles (EVs) produce different cabin noise than internal combustion engine (ICE) vehicles during low-speed driving. To identify the cause of the interior noise of an EV at low speed (30km/h) and to reduce it, a Helmholtz resonator made of pulp
Sachito NAKANO +3 more
doaj +1 more source
Frontiers in Materials, 2022 Acoustic energy, especially broadband low-frequency sound energy is part of the environmental mechanical energy acquisition cannot be ignored. Herein, a multi-tube parallel Helmholtz resonator-based triboelectric nanogenerator (MH-TENG) is investigated ...
Qiqi Zhang +6 more
doaj +1 more source
The theory of the Helmholtz resonator [PDF]
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1916 Abstract The ideal form of Helmholtz resonator is a cavernous space, almost enclosed by a thin, immovable wall, in which there is a small perforation establishing a communication between the interior and exterior gas. An approximate theory, based upon the supposition that the perforations is small, and consequently that the wave ...
openaire +1 more source
Photo‐Degradable Polyester Networks and Multi‐Photon Printed Objects Based on Cyclic Ketene Acetals
Advanced Functional Materials, EarlyView.The current work introduces a photoreversible polyester network derived from radical ring‐opening polymerization of cyclic ketene acetals. It combines photoreversible cross‐linking with initiator‐free multi‐photon printing. Reversible network formation, tunable mechanical properties, and selective degradation highlight its potential as a versatile ...
Till Meissner +5 more
wiley +1 more source
Nihon Kikai Gakkai ronbunshu, 2016 To reduce noise, Helmholtz resonators are widely used in internal-combustion engine intake systems, in the rocket engine's combustion chambers and building wall materials.
Shinichi MARUYAMA +2 more
doaj +1 more source
Resonant Metasurfaces with a Tangential Impedance
Acoustics, 2022 Metasurfaces formed by monopole and dipole resonators are studied theoretically. The monopole resonators are Helmholtz resonators or membranes vibrating on the first eigenfrequency; the dipole ones are spheres on springs or membranes vibrating on the ...
Nikolay Kanev
doaj +1 more source
RESEARCH OF THE RESONANCE PROPERTIES OF HELMHOLTZ RESONATORS
ScienceRise, 2020 The object of research. Process of oscillation of the Helmholtz resonators. Investigated problem. Differences between some formulas for the calculation of the resonant frequency of the Helmholtz resonator and the most accurate of them were established.
Yuliia Kopytko +4 more
openaire +2 more sources