Zobrazeno 1 - 10
of 1 406
pro vyhledávání: '"Sound absorption coefficient"'
Publikováno v:
Science and Engineering of Composite Materials, Vol 31, Iss 1, Pp 159-64 (2024)
The acoustic performance of metal hollow sphere (MHS) A356 aluminum matrix composites has a significant impact on their application, making it worthy of in-depth investigation. To investigate the acoustic performance and mechanism of MHS A356 aluminu
Externí odkaz:
https://doaj.org/article/955aa712201c4b2789af4c0e41536789
Publikováno v:
بهداشت و ایمنی کار, Vol 14, Iss 1, Pp 40-53 (2024)
Introduction: Disturbing noise can cause physical and mental illnesses among workers; for this reason, it is necessary to restrain it, especially in workplaces. Using sound-absorbing materials with suitable acoustic properties has been a growing tren
Externí odkaz:
https://doaj.org/article/4429df8144804dee9336ab29f8f8a3fc
Autor:
Strazdas Edgaras, Januševičius Tomas
Publikováno v:
Environmental and Climate Technologies, Vol 28, Iss 1, Pp 269-285 (2024)
Exploring sound absorption solutions, hemp fibre stands out as a compelling replacement for traditional materials like fiberglass, foam, and mineral wool. The aim of this study is to conduct a comprehensive investigation into the sound absorption of
Externí odkaz:
https://doaj.org/article/e2adc944349747fa893791867a7f93fa
Autor:
Naimušin Andrej, Januševičius Tomas
Publikováno v:
Environmental and Climate Technologies, Vol 28, Iss 1, Pp 208-220 (2024)
According to the Waste Management Policy of the European Union, the recycling and reuse of various wastes is considered the most environmentally friendly and advanced waste disposal technology that has the least impact on the environment. By applying
Externí odkaz:
https://doaj.org/article/a2ee70255bf14addae64c6b3176b62d7
Autor:
Zhonghua Li, Yujun Zhou, Xiangnan Kong, Pengfei Zhang, Sichen Pei, Lipeng Ge, Yunfei Nie, Bin Liu
Publikováno v:
Virtual and Physical Prototyping, Vol 19, Iss 1 (2024)
ABSTRACTThis study proposes a sandwich structure of triply periodic minimal surface (TPMS) based on the theory of micro-perforated plates. This structure was processed using laser selective melting (SLM) with the acoustic-vibration theoretical model
Externí odkaz:
https://doaj.org/article/d0c5ea067e944ae1bbd3fc0bb59d6267
Publikováno v:
Cleaner Materials, Vol 12, Iss , Pp 100245- (2024)
To address the pressing need for sustainable building materials, this study introduced an innovative and eco-friendly approach to manufacturing thermal-acoustic panels, utilizing agricultural waste with rice straw as the primary material. Paper pulp
Externí odkaz:
https://doaj.org/article/5e101dace34140c2b320da5afc6d41d8
Autor:
Mariana Domnica Stanciu, Mihaela Coșniță, Ghiorghe Vasile Gliga, Lidia Gurau, Maria Cristina Timar, Maria Violeta Guiman, Silviu Marian Năstac, Ioan Călin Roșca, Voichita Bucur, Florin Dinulică
Publikováno v:
Advanced Materials Interfaces, Vol 11, Iss 10, Pp n/a-n/a (2024)
Abstract The study investigates the effect of the type of varnish and the number of layers on some acoustic properties of the resonance spruce in combination with the changes produced in some physical, morphological, and chemical properties of wood.
Externí odkaz:
https://doaj.org/article/b985db157ce747f3acba31863a4e7c29
Publikováno v:
Heliyon, Vol 10, Iss 7, Pp e28612- (2024)
In the present study, the sound absorption performance of inhomogeneous Micro-Perforated Panels (MPPs) with multiple cavities is investigated. Two models, a three-cavity system and a four-cavity system, are proposed and a numerical study is performed
Externí odkaz:
https://doaj.org/article/c36f55a58cd240349c1405c11db37ea5
Publikováno v:
Machines, Vol 12, Iss 8, p 499 (2024)
Electric propulsion motors are more efficient than internal combustion engines, but they generate high-frequency tonal noise, which can be perceived as annoying. Acoustical materials are typically suitable for high-frequency noise, making them ideal
Externí odkaz:
https://doaj.org/article/4ddb9a9dadd54ddfabaf66df2a43b1a2
Autor:
Christmastuti Nur
Publikováno v:
ARTEKS : Jurnal Teknik Arsitektur, Vol 8, Iss 2, Pp 283-292 (2023)
Noise reduction in residential and other types of buildings in urban areas is becoming more important. However, the cost of sound-absorbing materials is still prohibitively expensive for some people. The objective of this study is to create alternati
Externí odkaz:
https://doaj.org/article/2e9b4cbdd7eb4dcd9023b7db37561aa1