Temat: sound reduction - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Sound Insulation of Dwellings Façades : the Case of Santiago de Chile
Autorzy:: Meza, Leonardo
Delannoy, Jaime
Marzzano, Antonio
Fuentes, Mauricio
Powiązania:: https://bibliotekanauki.pl/articles/176347.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: sound reduction index
construction quality
acoustic insulation
façade
Opis:: The increment in the number of automobiles and the densification of the city has increased noise pollution rates. In addition, the lack of regulation in Chile regarding the acoustic insulation of façades is a problem of a growing concern. The main objective of the present study was to obtain a model of the Sound Insulation of housing, façades, stratified in Santiago, Chile, based on constructive variables. It is expected to serve as a basis for one future regulation for acoustic façades of houses. In the present study, tests based on the international ISO 140-5 standard were carried out in situ. An estimation model of the Standardized Level Difference D_ls;2m;nT;w + C, was obtained based on the opening/façade proportion, and the type of glass used for the windows.
Źródło:: Archives of Acoustics; 2019, 44, 1; 99-104
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sound Field Modelling and Noise Reduction for a Forklift Power Compartment Based on Perfectly Matched Layer and Acoustic Packaging Design
Autorzy:: Zhang, Enlai
Liu, Zhiqi
Zhang, Jingjing
Lin, Jiahe
Powiązania:: https://bibliotekanauki.pl/articles/1945640.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: forklift power compartment
sound field modelling
perfectly matched layer
acoustic packaging design
noise reduction
Opis:: The core goal of this paper is to put forward a feasible scheme of noise reduction for a target forklift on the basis of solving the problem of vibration and acoustic radiation from complex structures in infinite domain. Based on the previous report and vibration acceleration tests, the acoustic virtual wind tunnel model of forklift power compartment was established using finite element method and boundary element method, in which the perfectly matched layer was first applied to simulate the attenuation propagation of sound waves in air. In addition, according to the distribution characteristics of sound pressure field with different frequencies, the acoustic energy mainly radiated through the bottom and right side, and concentrated in the low frequency. Consequently, the acoustic packaging design for the whole forklift power compartment was presented, and a satisfying noise reduction effect was achieved.
Źródło:: Archives of Acoustics; 2021, 46, 3; 491-498
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

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