Zobrazeno 1 - 10
of 6 797
pro vyhledávání: '"The sound absorption"'
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:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract Controlling the absorption and diffusion of sound in the audible range constitutes an exciting field of research. Acoustic absorbers and diffusers perform extraordinarily well at high frequencies with sizes comparable to the wavelength of th
Externí odkaz:
https://doaj.org/article/8a016eb4646943d7b4b6d6f5ef517bba
Publikováno v:
Vestnik MGSU, Vol 19, Iss 9, Pp 1521-1529 (2024)
Introduction. Sound-absorbing systems are widely used in construction, reconstruction, repair of industrial and civil facilities, as well as in mechanical engineering. The most affordable and widely used systems are those using porous materials. The
Externí odkaz:
https://doaj.org/article/754d3a116e5842628abe82e7bf3316c4
Publikováno v:
Modelling, Vol 5, Iss 3, Pp 969-989 (2024)
Effective sound absorption is crucial in environments like schools and hospitals. This study evaluates open-pore polyurethane foam and perforated onyx panels, which attenuate noise via distinct mechanisms: porous materials convert sound energy to hea
Externí odkaz:
https://doaj.org/article/862ae357a31640789d0a41a591e8aad8
Autor:
Ahmed Abdelhamid Maamoun, Ramadan M. Abouomar, Tarek M. El-Basheer, Mostafa A. Azab, ElSayed G. Zaki, Shymaa M. Elsaeed, Ahmed Elkhateeb
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-20 (2024)
Abstract This study aims to investigate the potential of integrating natural biochar (BC) derived from eggshell waste into flexible polyurethane (FPU) foam to enhance its mechanical and acoustic performance. The study explores the impact of incorpora
Externí odkaz:
https://doaj.org/article/01e72f9d8da843da9636b7cbbc250b0a
Publikováno v:
BioResources, Vol 19, Iss 3, Pp 5568-5585 (2024)
This study was conducted to investigate some characteristics of thermally treated Scots pine (Pinus sylvestris L.) wood specimens such as air-dried density, color change, average surface roughness, and sound absorption capacity. Heat treatment of Sco
Externí odkaz:
https://doaj.org/article/2e975794b01740b884ad13627f7042d8
Publikováno v:
بهداشت و ایمنی کار, Vol 14, Iss 2, Pp 367-384 (2024)
Introduction: A wood-wool cement panel (WWCP) is wood wool combined with Portland cement mortar. This environmentally friendly acoustic material can be used as a thermal insulator and fire-resistance material with desired mechanical properties. This
Externí odkaz:
https://doaj.org/article/6512ccf60885478184ad46bda2a2144d
Autor:
Rohollah Fallah Madvari, Mohsen Niknam Sharak, Mohammad Javad Jafari, Faezeh Abbasi Balochkhaneh
Publikováno v:
Journal of Environmental Health and Sustainable Development, Vol 9, Iss 2, Pp 2249-2256 (2024)
Introduction: The principle of passive sound control is based on the phenomenon of sound absorption by absorbers. The factors affecting sound absorption include porosity, pore size, pore opening size, thickness, and air flow resistance. Materials and
Externí odkaz:
https://doaj.org/article/d0b8c16c3c5a461f97332d05de748385
Autor:
Mustafa Selmani Muslu
Publikováno v:
Maderas: Ciencia y Tecnología, Vol 27 (2024)
Noise which could be defined as disturbing sound, is becoming a major problem depending with developing technology. Controlling the noise helps raising the quality of life to higher levels. Although the intensity of the noise is not at a level that w
Externí odkaz:
https://doaj.org/article/79619fea8ef74c95b8368bd7bc69db29
Publikováno v:
Engineering Reports, Vol 6, Iss 11, Pp n/a-n/a (2024)
Abstract The interest of this article is to obtain the underwater broadband sound absorption characteristics by filling three layers of bubbles in Polydimethylsiloxane polymer (PDMS). In this underwater ultra‐thin metamaterial, three‐layer bubble
Externí odkaz:
https://doaj.org/article/d073eab5edda407982d0281d99d6203c