Autor: Szeląg, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of the Accuracy of Uncertainty Noise Measurement
Autorzy:: Przysucha, B.
Batko, W.
Szeląg, A.
Powiązania:: https://bibliotekanauki.pl/articles/176813.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: acoustics
noise measurement
uncertainty in measurement
probability distribution
Opis:: The paper formulates some objections to the methods of evaluation of uncertainty in noise measurement which are presented in two standards: ISO 9612 (2009) and DIN 45641 (1990). In particular, it focuses on approximation of an equivalent sound level by a function which depends on the arithmetic average of sound levels. Depending on the nature of a random sample the exact value of the equivalent sound level may be significantly different from an approximate one, which might lead to erroneous estimation of the uncertainty of noise indicators. The article presents an analysis of this problem and the adequacy of the solution depending on the type of a random sample.
Źródło:: Archives of Acoustics; 2015, 40, 2; 183-189
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Sound Reflection from Overhead Stage Canopies Depending on Ceiling Modification
Autorzy:: Kamisiński, T.
Szeląg, A.
Rubacha, J.
Powiązania:: https://bibliotekanauki.pl/articles/178128.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sound reflection
room acoustics
reflecting structures
Opis:: Reflecting structures placed over the stage in auditoria and concert halls should provide sound reflection in a way that enhances sound emission from the stage without causing acoustic defects in the interior. Model studies conducted by the authors were used to determine the relative level of sound reflection by reflecting structures as a function of frequency for a number of geometric configurations and materials. Analysis of the results allowed drawing conclusions about the effect of modifications of the ceiling over the reflecting panels on the quality of the sound reflected from them. It was shown that modification of the ceiling over the reflecting panels by employing highly sound absorbing materials significantly improved the characteristics of the reflected sound. Also, certain configurations of elements located in the space under the ceiling should be avoided, as the experiments indicated the occurrence of adverse acoustic effects.
Źródło:: Archives of Acoustics; 2012, 37, 2; 213-218
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The Characteristic of Sound Reflections from Curved Reflective Panels
Autorzy:: Szeląg, A.
Kamisiński, T.
Lewińska, M.
Rubacha, J.
Pilch, A.
Powiązania:: https://bibliotekanauki.pl/articles/177712.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sound reflection
reflective panels
sound scattering
Opis:: The paper presents the verification of a solution to the narrow sound frequency range problem of flat reflective panels. The analytical, numerical and experimental studies concerned flat panels, panels with curved edges and also semicircular elements. There were compared the characteristics of sound reflected from the studied elements in order to verify which panel will provide effective sound reflection and also scattering in the required band of higher frequencies, i.e. above the upper limit frequency. Based on the conducted analyzes, it was found that among some presented solutions to narrow sound frequency range problem, the array composed of panels with curved edges is the most preferred one. Nevertheless, its reflection characteristic does not meet all of the requirements, therefore, it is necessary to search for another solution of canopy which is effective over a wide frequency range.
Źródło:: Archives of Acoustics; 2014, 39, 4; 549-558
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

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

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