Temat: 43.55.Hy - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Evaluation of Acoustical Properties of an Auditorium after a Modernisation Program
Autorzy:: Czerwiński, A.
Dziechciowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1360158.pdf
Data publikacji:: 2014-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.55.Br
43.55.Fw
43.55.Hy
Opis:: This study summarises and compares the measurement results of acoustical properties of an auditorium located on the campus of the Faculty of Mechanical Engineering at the Cracow University of Technology. The auditorium was thoroughly modernised and its acoustic features adapted. Measurements of the room acoustics were first taken prior to the modernisation program and were repeated after completion of the modernisation works. Evaluation of auditorium acoustics was based on the following parameters: reverberation time, early/late energy ratio (clarity) $C_{50}$, early decay time, speech intelligibility indices, and uniformity of sound distribution. The effect of the modernisation program on levels of those parameters are explored and conformity to the design objectives is analysed.
Źródło:: Acta Physica Polonica A; 2014, 125, 4A; A-71-A-76
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Acoustic Field Distortions Caused by Helium-Filled Balloons
Autorzy:: Majkut, L.
Olszewski, R.
Pluta, M.
Powiązania:: https://bibliotekanauki.pl/articles/1197538.pdf
Data publikacji:: 2014-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.55.Br
43.55 Hy
43.55.Nd
43.55.Mc
Opis:: In this paper, an automated measurement system was proposed that uses a probe hung below a remotely controlled balloon to measure parameters of the acoustic field in the whole volume of a room. The study was conducted to estimate distortions that such system may cause in the acoustic field at the measurement point. The most significant source of the distortions will be the buoyancy element - one large balloon or a number of smaller ones. This paper considers different spatial configurations of spherical balloons with regards to alterations they cause in the acoustic pressure levels measured below them. Interior of a room without and with a group of spherical balloons was modeled using the boundary element method. Using a larger number of smaller spheres instead of a single large one did not significantly reduce the related distortions. However, using two spheres slightly decreased distortions when the distance between the balloons and the recording point was relatively small.
Źródło:: Acta Physica Polonica A; 2014, 125, 4A; A-84-A-87
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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