Temat: sound diffusion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Comprehensive Research of the Road Acoustic Screen with Absorbing and Diffusing Surface
Autorzy:: Kamisiński, T.
Kinasz, R.
Szeląg, A.
Rubacha, J.
Pilch, A.
Flach, A.
Baruch, K.
Powiązania:: https://bibliotekanauki.pl/articles/177952.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: acoustics
mechanical strength
environmental actions
sound reflection
sound diffusion
Opis:: The paper presents the new solution to a road acoustic screen consisting of elements which are highly diffusing and simultaneously resistant to weathering, but also characterised by a sound absorption. There is described the comprehensive research of such the road acoustic screen with absorbing and diffusing surface. The study includes screen’s resistance to wind load and snow removal, impact tests and measurements of some acoustic parameters.
Źródło:: Archives of Acoustics; 2015, 40, 1; 137-144
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Identification of Sound Power Levels and Surface Absorption Coefficients in Multi-Source Industrial Buildings by Using a Simplified Diffusion Model
Autorzy:: Sequeira, M. E.
Cortínez, V. H.
Powiązania:: https://bibliotekanauki.pl/articles/177679.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: industrial noise
noise source identification
sound absorption coefficient
two-dimensional acoustic diffusion model
simulated annealing algorithm
Opis:: This article deals with the identification of sound powers and absorption surface coefficients in multisource industrial buildings from the knowledge of the sound pressure levels (SPLs) at several monitoring points. This inverse problem is formulated as one of optimisation in which the objective function is the difference between the measured and predicted SPLs. The methodology combines the use of a simplified acoustic diffusion model with the simulated annealing optimisation technique. The former is a recently developed model for estimating the SPLs in a fast and sufficiently accurate form. The low computational cost of the model constitutes the major advantage for the optimisation procedure due to the great numer of simulations required. Numerical examples are given to show the efficiency of the proposed approach.
Źródło:: Archives of Acoustics; 2018, 43, 1; 93-102
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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