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    Wyświetlanie 1-23 z 23
    Tytuł:
    Acoustic Simulation and Experimental Studies of Theatres and Concert Halls
    Autorzy:
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537463.pdf
    Data publikacji:
    2010-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.55.Ka
    43.55.Mc
    43.55.Br
    Opis:
    Paper presents a numerical simulation of the acoustics of selected concert halls performed using CATT-acoustic software, and the results of acoustic measurements performed in these spaces.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 1; 78-82
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correction of Acoustics in Historic Opera Theatres with the Use of Schroeder Diffuser
    Autorzy:
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/176634.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    opera house
    Schroeder diffusers
    Lviv
    underbalcony
    horseshoe plan
    focusing
    scattering
    Opis:
    The paper deals with the problem of acoustic correction in historic opera theatres with the auditorium layout in the form of a horseshoe with deep underbalcony cavities limited with a semicircular wall surface. Both geometry of the cavities and excessive sound absorption determine acoustic phenomena registered in this area of the hall. The problem has been observed in the Theatre of Opera and Ballet in Lviv, Ukraine, where acoustic tests were carried out, simulation calculations performed, and finally a diffusion panel worked out designed for the rear wall of the underbalcony space. Acoustic measurements carried out after installation of the diffusers revealed favourable changes in the sound strength factor G within the range of medium and high frequencies in the underbalcony and auditorium centre area. By replacing textile tapestry with diffusion panels, a significant reduction of sound absorption was achieved for the frequency range above 1 kHz and an increase of uniformity of acoustic parameters registered in the hall. The method presented in the paper can be applied in historic halls of the similar type as well as contemporary rooms where there is a need for correction of acoustic flaws related to sound focusing or the echo effect.
    Źródło:
    Archives of Acoustics; 2012, 37, 3; 349-354
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Geometrical and Material Modification of Sound Diffusers on Their Acoustic Parameters
    Autorzy:
    Pilch, A.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/176935.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Schroeder diffusers
    scattering
    diffusion
    absorption
    Opis:
    Sound diffusers, in particular those based on changes in the phase of the reflected wave (Schroeder diffusers), have recently gained greatly in popularity in acoustics as an effective means to eliminate defects and improve the acoustic performance of interiors. This paper draws attention to a possibility of shaping acoustic parameters of sound diffusers and fundamental errors made in applying diffusers. Also, an often neglected issue of sound absorption by diffusers has been tackled. The presented results of laboratory measurements indicate a great significance of the diffusers' rigidity and geometry on their absorption coefficient at low frequencies. The effect of arrangement of elements on the diffusion coefficient was analysed for two types of elements based on the prime number N = 7.
    Źródło:
    Archives of Acoustics; 2011, 36, 4; 955-966
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurements of parameters of sound reflecting screens
    Pomiary parametrów akustycznych struktur refleksyjnych
    Autorzy:
    Kamisiński, T.
    Polaczek, A.
    Rubacha, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/369049.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    panele refleksyjne
    sala koncertowa
    współczynnik odbicia dźwięku
    sound reflecting panels
    concert hall
    sound reflection efficiency
    acoustic upgrade
    Opis:
    Sound reflecting panels are commonly used in concert and conference halls in order to transmit reflected sound to the audience and improve hearing conditions among musicians. The main problem is to design these elements properly. In this paper, the frequency limits of a useful sound transmission range and the efficiency of reflecting structures are theoretically estimated and experimentally verified.
    Panele refleksyjne są powszechnie stosowane w salach koncertowych i audytoryjnych. Głównym ich zadaniem jest przekazywanie odbitego dźwięku w kierunku publiczności oraz poprawa słyszalności pomiędzy muzykami na scenie. Odpowiednie zaprojektowanie takich struktur jest jednak bardzo skomplikowane i czasochłonne. W artykule porównano otrzymane doświadczalnie wartości wybranych parametrów akustycznych struktur refleksyjnych z wartościami wyznaczonymi z teoretycznych wzorów.
    Źródło:
    Mechanics and Control; 2010, 29, 4; 174-178
    2083-6759
    2300-7079
    Pojawia się w:
    Mechanics and Control
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Can Historic Interiors with Large Cubature be Turned Acoustically Correct?
    Autorzy:
    Kamisiński, T.
    Kulowski, A.
    Kinasz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/176499.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    room acoustics
    acoustic rehabilitation of historic interiors
    Schroeder diffusers
    microperforated foil
    Opis:
    Historic interiors with large cubature, such as reception, theatrical, and concert halls, need to be renovated periodically if they are to be preserved as cultural heritage for future generations. In such cases it is necessary to maintain appropriate balance between requirements imposed by heritage conservation authorities office which are usually being given a higher priority, applicable safety regulations, and the comfort of use, including good acoustics. The paper is a presentation of architectural interference in three historic interiors with large cubature leading to changes in their acoustic qualities. In two cases, the changes were beneficial to the functional qualities of the halls to satisfaction of the investors carrying out the renovation work. In the third instance, the architectural interference aimed at showing off the monumental valor of the interior resulted in significant degradation of its acoustics. To remedy the situation impairing the functional program of the facility, corrective measures are proposed neutral with respect to its historic character.
    Źródło:
    Archives of Acoustics; 2016, 41, 1; 3-14
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Testing of a Device for Positioning Measuring Microphones in Anechoic and Reverberation Chambers
    Autorzy:
    Felis, J.
    Flach, A.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/178139.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    positioning system
    manipulator
    turntable
    anechoic chamber
    Opis:
    This paper presents a mechanical positioning system for a measuring microphone designed for acoustic studies in anechoic and reverberation chambers at the Department of Mechanics and Vibroacoustics, AGH. The results are discussed in the context of mechanical positioning and its impact on the outcome of the execution of individual measurement procedures. Moreover, areas for research were identified and solution concepts shown for further development of the automation of acoustic measurements in different research rooms in order to reduce the human involvement in them.
    Źródło:
    Archives of Acoustics; 2012, 37, 2; 245-250
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Narrow Frequency Range Problem of Sound Reflector Arrays
    Autorzy:
    Szeląg, A.
    Rubacha, J.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400090.pdf
    Data publikacji:
    2013-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.55.-n
    43.20.El
    Opis:
    Overhead stage canopies composed of many panels suspended under ceiling provide proper acoustic field in concert halls and auditoria. The purpose of using these structures is adequate direction and partial dispersion of sound reflected from them. Frequency range of sound reflected from flat panels closely depends on their shape, size and configuration. It is often too narrow and therefore insufficient for the proper sound of the interior. Mutual dependence of the lower and upper frequency limit of sound transmission requires the search for other ways to improve these structures. The paper proposes some solutions concerning spatial structures which have not been yet defined. An attempt was made to determine the useful frequency band of sound transmitted through such reflective structures.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 6; 1059-1063
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sound Radiation by Vibrating Building Partitions in Terms of Acceptable Vibration Values
    Autorzy:
    Szeląg, A.
    Stypuła, K.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1196849.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.20.Tb
    34.50.Ez
    43.40.-r
    43.40.+s
    Opis:
    The subject of this study is an analysis of the phenomenon of sound radiation generated by vibrating building partitions in terms of acceptable vibration values set out in PN-88/B-02171: Evaluation of the vibration impact on people in buildings. The aim of the research was to determine conditions when vibration limits, determined as those providing the required human comfort according to the standard, do not meet the requirements of PN-87/B-02151/02 describing sound level limits in rooms. In order to carry out research showing the phenomenon, various aspects of sound radiation by vibrating building partitions were analyzed theoretically. It was assumed that the vibration velocity of elements did not exceed the limits specified in the standard. Calculations were carried out, in particular, for variants with variable thickness or surface of vibrating partition as well as various types of the construction material. Furthermore, the minimum vibration duration was determined for which the values of noise exceeded the sound level limits.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4A; A-122-A-126
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Study of Sound Scattering Structures for the Purposes οf Room Acoustic Enhancement
    Autorzy:
    Kamisiński, T.
    Rubacha, J.
    Pilch, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537465.pdf
    Data publikacji:
    2010-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.20.Fn
    43.55.Br
    43.58.+z
    Opis:
    Acoustic structures are currently classified mainly in terms of their acoustic absorption and insulation properties. Knowing the sound scattering parameter can significantly improve the useful value of materials and identify their best applications. Currently no studies are performed in Poland on the sound scattering coefficients of materials. This is due to a complex measurement procedure and a lack of legal requirements. The authors have attempted to make such measurements on the basis of the standard ISO 17497-1:2004: Acoustics - Sound-scattering properties of surfaces - Part 1: Measurement of the random-incidence scattering coefficient in a reverberation room. Measurement and calculation methods are presented, and problems encountered during this study have been described. This issue is of particular importance, especially in the acoustic design of interiors.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 1; 83-86
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Pressure and Intensity Methods in Evaluating the Directional Diffusion Coefficient
    Autorzy:
    Pilch, A.
    Kamisiński, T.
    Zastawnik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400088.pdf
    Data publikacji:
    2013-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.55.-n
    43.55.Ka
    43.55.Mc
    43.20.Ei
    Opis:
    The directional diffusion coefficient characterizes directional uniformity of acoustic energy reflected from a structure. The goal of the paper is to check whether different measurement methods of that coefficient give comparable results and can be used for different diffusing structures. ISO 17497-2:2012 recommends two basic measurement methods for this parameter, both based on sound pressure analysis. In the first method, one microphone and a measurement manipulator is used (the space method), while in the second one, 19 microphones placed on the sound-reflecting plane are required (the boundary method). In the standard it is assumed (as usually in the room acoustics), that the acoustic energy is proportional to the square of sound pressure, what is true only for the plane wave. Correctness of this assumption was checked by the modified space method where the sound intensity probe was installed instead of microphone. The test revealed that pressure methods gave comparable results for both low- and high-diffusion structures, with the boundary method giving moderately higher values for low-diffusion structures and slightly higher for high-diffusion structures. The results obtained in the intensity method were comparable with the pressure method except for the 2000 Hz frequency range.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 6; 1054-1058
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Tytuł:
    Acoustic Simulation’s Verification of WFI ATHENA Filterwheel Assembly
    Autorzy:
    Pilch, A.
    Kamisiński, T.
    Rataj, M.
    Polak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/176723.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    filterwheel mechanism
    FEM
    finite element method
    FEM acoustic analysis
    ATHENA mission
    WFI
    Wide Filed Imager
    Opis:
    Ariane 5 rocket produces very high sound pressure levels during launch, what can influence structures located in the fairing. To reduce risk of damage, launch in vacuum conditions is preferred for noise sensitive instruments. In Wide Filed Imager (WFI) project, the main part of the filterwheel assembly is an extremely thin (~240 nm) filter of large area (170×170 mm), very sensitive to noise and vibrations. The aim of this study was to verify numerical calculations results in anechoic measurements. The authors also checked the influence of WFI geometry and sound absorbing material position on sound pressure level (SPL) affecting the filter mounted inside the assembly. Finite element method (FEM) simulations were conducted in order to obtain noise levels in filter position during Ariane 5 rocket launch. The results will be used in designing of WFI filterwheel assembly and endurance of the filter during launch verification.
    Źródło:
    Archives of Acoustics; 2017, 42, 3; 483-489
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pomiar parametrów akustycznych Auli Głównej Politechniki Lwowskiej
    Acoustic measurements of Lviv State University Assembly Hall
    Autorzy:
    Kamisiński, T
    Kinash, R
    Pilch, A
    Rubacha, J
    Powiązania:
    https://bibliotekanauki.pl/articles/362398.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Fizyki Budowli Katarzyna i Piotr Klemm
    Tematy:
    akustyka
    zrozumiałość mowy STI
    czas pogłosu
    Politechnika Lwowska
    acoustics
    speech intelligibility STI
    reverberation time
    Lviv State University
    Opis:
    W artykule przedstawiono opis historycznego wnętrza Auli Głównej Politechniki Lwowskiej, w której wykonano badania akustyczne według procedur normatywnych. Zestawiono wyniki pomiarów i obliczeń wybranych parametrów akustycznych Auli. Celem badań była ocena warunków akustycznych wnętrza pod kątem wypełnienia funkcji zgodnych z jego przeznaczeniem. Dane przygotowano dla potrzeb sporządzenia opinii na temat możliwości wykonania adaptacji akustycznej Auli. Napotkanym problemem przy adaptacji takich wnętrz są ograniczenia związane z koniecznością zachowania historycznej struktury obiektu.
    The paper concerns the Lviv State University Assembly Hall that was subject to standard acoustic measurements. A selection of results and calculations of acoustic parameters is presented. The main goal of the measurements was an evaluation of the hall’s acoustic conditions that are relevant to fulfilling the hall’s function. The results will be used to prepare an opinion on a possible acoustic adaptation of the hall. One of the challenges commonly encountered in such objects is the necessity to preserve their original architectural structure.
    Źródło:
    Fizyka Budowli w Teorii i Praktyce; 2011, T. 6, nr 3, 3; 23-26
    1734-4891
    Pojawia się w:
    Fizyka Budowli w Teorii i Praktyce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of the Measurement Chain on the Impulse Response of a Reverberation Room and Its Application Listening Tests
    Autorzy:
    Małecki, P.
    Zastawnik, M.
    Wiciak, J.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1504421.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.55.Hy
    43.55.Mc
    43.66.Lj
    Opis:
    There are many objective parameters of the room impulse response which we can calculate that describe its acoustic field. The room impulse response can also be used to provide listening tests using the convolution technique. The aim of this work is to consider the influence of the impulse response measurement chain on objective numerical parameters and on the subjective perception of listeners. This article shows the impulse response measurement results obtained in the reverberation room using not only commonly known measurement chain elements but other elements, too. Standard components such as an omni-directional source and measurement microphone, as well as a consumer active loudspeaker and various audio recording stereo microphone pairs were used. The results are compared taking into consideration calculated numerical parameters and the application of calculated impulse responses to subjective listening tests. To determine the applicability of impulse responses to psychoacoustic listening tests, a preliminary listening test using headphones was carried out on a selected group of listeners. The audio test material consisted of samples of choral music and speech recorded in an anechoic room and convolved with previously analyzed impulse responses. This article shows how big the differences of subjective listener feelings are for different acoustic transducers.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6A; 1027-1030
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    System for automated acoustic measurements in the anechoic chamber
    System do automatycznych badań akustycznych w komorze bezechowej
    Autorzy:
    Zbrowski, A.
    Mężyk, J.
    Giesko, T.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/258031.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    pomiar akustyczny
    manipulator pomiarowy
    komora bezechowa
    acoustic measurement
    measurement manipulator
    anechoic chamber
    Opis:
    The article presents the developed system for automated acoustic measurements taken in an anechoic chamber. Technical and functional parameters of the system fulfil specific work conditions in the anechoic chamber and meet the requirements for acoustic research. The automated programmed positioning of the measurement microphone in relation to the tested object is possible thanks to the special multi-axial manipulator. The developed construction of the system provides minimal influence on the acoustic properties of the anechoic chamber. The article also presents important issues of the introduction and the verification of the system.
    Artykuł prezentuje opracowany system do zautomatyzowanych pomiarów akustycznych prowadzonych w komorze bezechowej. Parametry techniczne i funkcjonalne systemu odpowiadają specyficznym warunkom pracy w komorze bezechowej i wysokim wymaganiom dla badań akustycznych. Automatyczne zaprogramowane pozycjonowanie mikrofonu pomiarowego względem badanego obiektu umożliwia specjalny manipulator wieloosiowy. Opracowana konstrukcja systemu zapewnia minimalny wpływ na własności akustyczne komory bezechowej. W artykule przedstawiono także istotne problemy procesu wdrożenia i weryfikacji systemu.
    Źródło:
    Problemy Eksploatacji; 2010, 3; 115-125
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Application of Double-layer Curtains for Shaping Acoustics of Concert Halls
    Autorzy:
    Pilch, A.
    Karlińska, A.
    Snakowska, A.
    Kamisiński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1196822.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.55.-n
    43.55.Dt
    43.58.-e
    Opis:
    Requirements concerning adjustment of acoustical parameters are nowadays more and more frequently numbered among design assumptions adopted for newly constructed concert halls and other auditoriums planned to play different functions. Investors usually require that the newly designed interiors can be used for such different purposes as playing orchestral music, performing theatre spectacles, screening movies, or holding lectures. This means the necessity to undertake studies on new technologies allowing to excert effective control over acoustics of multipurpose auditoriums. This paper proposes to use acoustic curtains as an effective means of modification of acoustic absorptivity of rooms. A design solutions for such curtains is described together with basics of the theory allowing to predict their acoustic properties. Results of sound absorption coefficient calculations performed for selected systems on the grounds of airflow resistivity values assumed for the used fabrics are verified by means of results of measurements performed in the impedance tube. It is proven that double-layer curtains show more balanced sound absorption characteristics compared to single-layer curtains and therefore represent a more convenient option when used for acoustical adaptation of rooms. Based on model studies, design solutions with double-layer curtains is developed for two concert halls that allow to adjust acoustic properties of the interiors to the required functions.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4A; A-113-A-116
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pomiary akustyczne i symulacja komputerowa wnętrza kościoła pw. Marii Magdaleny we Lwowie
    Acoustic measurements and computer simulation of the interior of st. Mary Magdalene church in Lviv
    Autorzy:
    Kamisiński, T.
    Kinasz, R.
    Rubacha, J.
    Kulowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/362750.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Fizyki Budowli Katarzyna i Piotr Klemm
    Tematy:
    fizyka budowli
    sala
    akustyka
    pomiary akustyczne
    symulacja komputerowa
    building physics
    hall
    acoustic
    acoustic measurements
    computer simulation
    Opis:
    W pracy omówiono akustyczne aspekty wykorzystania kościoła pod wezwaniem Św. Marii Magdaelny we Lwowie do celów koncertowych. Przedstawiono wyniki pomiarów akustycznych oraz koncepcję poprawy jego walorów akustycznych jako sali koncertowej z wykorzystaniem doraźnie wstawianych do wnętrza elementów, rozpraszających dźwięk i poprawiających wzajemne słyszenie się wykonawców.
    The paper discusses acoustical aspects of musical activity in St Mary Magdalene church in Lviv. The concept of improving acoustical qualities of the church when employed as a concert hall is presented. Current acoustics of the church meets both liturgical and musical requirements as long as the convention of using it as a historical object is maintained.
    Źródło:
    Fizyka Budowli w Teorii i Praktyce; 2010, T. 5, nr 2, 2; 21-26
    1734-4891
    Pojawia się w:
    Fizyka Budowli w Teorii i Praktyce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Korekta akustyczna sali wykładowej Politechniki Lwowskiej
    Acoustical correction of the lecture hall at the Lvov Technical University
    Autorzy:
    Kinasz, R.
    Kulowski, A.
    Kamisiński, T.
    Waczko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/363056.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Fizyki Budowli Katarzyna i Piotr Klemm
    Tematy:
    fizyka budowli
    sala
    akustyka
    pomiary akustyczne
    symulacja komputerowa
    Politechnika Lwowska
    building physics
    lecture hall
    acoustic
    acoustic measurements
    computer simulation
    Lvov Technical University
    Opis:
    Praca omawia korektę akustyczną sali wykładowej, cechujacej się dużą pogłosowością i małą zrozumiało- ścią mowy. Sala znajduje sie w zabytkowym budynku. Przedstawiono wyniki pomiarów akustycznych oraz kroki zaradcze prowadzące do zwiększenia zrozumiałości mowy, z uwzględnieniem ograniczeń wynikających z historycznego charakteru sali.
    The paper presents the results of acoustical measurements in the lecture hall with excessively long reverberation time and low intelligibility of speech. The hall is situated in the monumental building. Acoustical correction of the hall has been discussed which takes into account limitations resulting from its historical value.
    Źródło:
    Fizyka Budowli w Teorii i Praktyce; 2007, T. 2; 113-116
    1734-4891
    Pojawia się w:
    Fizyka Budowli w Teorii i Praktyce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ekran akustyczny z powierzchnią dyfuzyjną
    Acoustic Screen with Diffusion Surface
    Autorzy:
    Kamisiński, T.
    Flach, A.
    Rubacha, J.
    Pilch, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/143539.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
    Tematy:
    drogi
    hałas
    ekrany
    dyfuzja
    roads
    noise
    screens
    diffusion
    Opis:
    Ekrany akustyczne mogą odbijać, pochłaniać lub rozpraszać dźwięki. Ekran ze specjalnie zaprojektowaną powierzchnią dyfuzyjną ma wysoki stopień rozpraszania dźwięku. Ma również możliwość pochłaniania dźwięku dzięki komorom i systemem perforacji. Te właściwości umożliwiają zastosowanie ekranu do ochrony przed hałasem drogowym.
    Acoustic screen can reflect, absorb or scatter a sound. Screen with especially designed diffusion surface gives high degree of sound scattering. It has also possibility of sound absorbing by mean of cells and perforation system. These characteristic features make possible the use of such screen for protection against road noise.
    Źródło:
    Drogownictwo; 2010, 12; 416-418
    0012-6357
    Pojawia się w:
    Drogownictwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Test Signal Selection for Determining the Sound Scattering Coefficient in a Reverberation Chamber
    Autorzy:
    Kamisiński, T.
    Brawata, K.
    Pilch, A.
    Rubacha, J.
    Zastawnik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/176622.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Schroeder diffusers
    scattering
    MLS
    sine sweep
    Opis:
    The paper focuses on the problem of test signal selection in determining the sound scattering coefficient in accordance with ISO 17497-1. Research shows that the use of MLS signal is preferred in this procedure. The sine sweep signal, despite its advantages, presents certain limitations if the sample is moving during measurement. An attempt has been made to develop a method that allows for minimization of error, demonstrating the dependence of the obtained values of the sound scattering coefficient on the rotational speed of the turntable and type of test signal. Conditions for the application of the sine sweep signals in continuous and discrete measurements were defined.
    Źródło:
    Archives of Acoustics; 2012, 37, 4; 405-409
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sound Diffusers with Fabric Covering
    Autorzy:
    Kamisiński, T.
    Brawata, K.
    Pilch, A.
    Rubacha, J.
    Zastawnik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/176693.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fabric covering
    Schroeder diffusers
    absorption
    scattering
    Opis:
    Fabric covering is often used by designers, as it can easily mask acoustic structures that do not match an interior. However, in the case of sound diffusers based on change in the phase of the reflected wave, the use of fabric covering is not without its effect on acoustics. It reduces the effectiveness of these structures and raises acoustic absorption. In the paper, the authors analyzed the acoustical properties of a selected fabric used to cover sound diffusers. Sound absorption and scattering coefficients for a system composed of sound diffusers and a fabric situated at different distances d were measured. The results were compared to the sound absorption predicted on the basis of Kuttruff’s and Mechel’s theoretical models. Analysis of the results indicates that the fabric has a significant influence on the system’s acoustic parameters. It is also observed, that fabric applied directly on a phase grating diffuser, produces higher absorption than when it is at some distance from it.
    Źródło:
    Archives of Acoustics; 2012, 37, 3; 317-322
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    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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