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Tytuł:
Wpływ pogłosowości na inne parametry akustyczne pomieszczenia
Effect of reverberation of room on its other acoustical parameters
Autorzy:
Jabłoński, M.
Marciniak, J.
Powiązania:
https://bibliotekanauki.pl/articles/362925.pdf
Data publikacji:
2005
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
pogłos
akustyka pomieszczeń
reverberation
room acoustics
Opis:
W referacie przedstawiono wyniki symulacji komputerowej mającej na celu dopasowanie czasu pogłosu dla odbioru mowy i muzyki do wartości optymalnych poprzez zmianę rozwiązań materiałowych pomieszczenia. Następnie przeanalizowano wpływ takiego rozwiązania na inne, wybrane atrybuty akustyczne.
The results of the computer simulation conceming Reverberation Time of room, have been presented in the paper. The surface materials have been adjusted due to optimal value of t his parameter. Finally the influence of reverberation time on other acoustical parameters have been analysed and discussed.
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2005, T. 1; 142-150
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the Acoustical Climate of Underground Stations
Autorzy:
Nowicka, E.
Powiązania:
https://bibliotekanauki.pl/articles/90611.pdf
Data publikacji:
2007
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
room acoustics
long enclosure
Opis:
Designing a proper acoustical environment—indispensable to speech recognition—in long enclosures is difficult. Although there is some literature on the acoustical conditions in underground stations, there is still little information about methods that make estimation of correct reverberation conditions possible. This paper discusses the assessment of the reverberation conditions of underground stations. A comparison of the measurements of reverberation time in Warsaw’s underground stations with calculated data proves there are divergences between measured and calculated early decay time values, especially for long source–receiver distances. Rapid speech transmission index values for measured stations are also presented.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 427-431
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zależność pomiędzy zapełnieniem widowni a akustyką audytorium
Dependences between number of people in room and acoustic conditions
Autorzy:
Jabłoński, M.
Powiązania:
https://bibliotekanauki.pl/articles/362420.pdf
Data publikacji:
2008
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
akustyka pomieszczeń
czas pogłosu
chłonność akustyczna
równoważna powierzchnia dźwiękochłonna
room acoustics
reverberation time
absorptivity of acoustics
sound absorbing equivalent area
Opis:
W artykule przedstawiono wpływu ilości osób w pomieszczeniu na parametry akustyczne audytorium. Problem ten został przeanalizowany w programie ESP-r. Analizie poddano największe audytorium na Wydziale Budownictwa, Architektury i Inżynierii Środowiska Politechniki Łódzkiej. Analizowano wpływ zmian ilości osób zajmujących miejsca dla publiczności na parametry akustyczne audytorium.
The paper presents results of sound transport analysis. The calculation were done using advanced computer simulation program ESP-r. The analysed room was one of the biggest lecture theatre at Technical University in Lodz, Poland with maximum sitting places for about 120 people. Presented results show the dependences between number of people in room and acoustic conditions (reverberation time and total equivalent area in zone).
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2008, T. 3; 19-22
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computing Impulse Response of Room Acoustics Using the Ray-Tracing Method in Time Domain
Autorzy:
Alpkocak, A.
Sis, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/177974.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
acoustics simulation
Opis:
This paper proposes a new approach for calculating the impulse response of room acoustics. Impulse response provides unique characterization of any discrete lineartime invariant (LTI) systems. We assume that the room is a linear time-invariant system and the impulse response is calculated simply by sending a Dirac Impulse into the system as input and getting the response from the output. Then, the output of the system is represented as a sum of time-shifted weighted impulse responses. Both mathematical justifications for the proposed method and results from simulation software developed to evaluate the proposed approach are presented in detail.
Źródło:
Archives of Acoustics; 2010, 35, 4; 505-519
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Facilities for Music Education and Their Acoustical Design
Autorzy:
Koskinen, H.
Toppila, E.
Olkinuora, P.
Powiązania:
https://bibliotekanauki.pl/articles/89954.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
music
sound exposure
room acoustics
reverberation time
sound absorption
Opis:
Good rehearsal facilities for musicians are essential. Directive 2003/10/EC necessitates that musicians are protected from noise exposure. A code of conduct gives the guidelines how this should be done. This study examines room acoustics recommendations provided by the Finnish code of conduct, and discusses whether they are adequate. Small teaching facilities were measured after renovation and compared to earlier measurements. Teachers’ opinions were inquired about the facilities before and after. The renovation did not decrease the noise exposure of the teachers. However, the majority preferred the facilities after the renovation. The Finnish code of conduct is not sufficient for facilities where loud instruments are played, or band practise. Good facilities can be designed but they must be specified at the designing stage for their intended use.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 1; 93-104
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Acoustical Characteristics and Some Recommendations for Different Educational Rooms
Autorzy:
Escobar, V. G.
Morillas, J. M. B.
Powiązania:
https://bibliotekanauki.pl/articles/177054.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
intelligibility
reverberation time
educational rooms
Opis:
Acoustic parameters were analysed in nine auditoria and multi-purpose conference rooms in the University of Extremadura. Parameters related to the reverberation time, background noise, and intelligibility (both physical measurements of different parameters [Definition (D-50) and STI] and speech tests used to study the subjective response of listeners) were studied. The measurements were compared with some recommendations from the literature and, considering that speech was the main use of the studied rooms, with the intelligibility results. Some different recommendations for reverberation times taken from the literature were analysed. The intelligibility results obtained from the measurements were also compared with the intelligibility results that were determined by the speech tests.
Źródło:
Archives of Acoustics; 2011, 36, 4; 741-759
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimating Surface Acoustic Impedance With the Inverse Method
Autorzy:
Piechowicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/90473.pdf
Data publikacji:
2011
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
room acoustics
sound absorption coefficient
acoustic impedance
Opis:
Sound field parameters are predicted with numerical methods in sound control systems, in acoustic designs of building and in sound field simulations. Those methods define the acoustic properties of surfaces, such as sound absorption coefficients or acoustic impedance, to determine boundary conditions. Several in situ measurement techniques were developed; one of them uses 2 microphones to measure direct and reflected sound over a planar test surface. Another approach is used in the inverse boundary elements method, in which estimating acoustic impedance of a surface is expressed as an inverse boundary problem. The boundary values can be found from multipoint sound pressure measurements in the interior of a room. This method can be applied to arbitrarily-shaped surfaces. This investigation is part of a research programme on using inverse methods in industrial room acoustics.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2011, 17, 3; 271-276
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena jakości akustycznej pomieszczenia na podstawie krzywej rozkładu dźwięku w przestrzeni oraz krzywej zaniku
Assessment of a room acoustic quality on a basis of spatial decay curve
Autorzy:
Jabłoński, M
Powiązania:
https://bibliotekanauki.pl/articles/362679.pdf
Data publikacji:
2011
Wydawca:
Instytut Fizyki Budowli Katarzyna i Piotr Klemm
Tematy:
akustyka pomieszczeń
krzywe rozkładu dźwięku
czas pogłosu
ciśnienie akustyczne
właściwości akustyczne pomieszczeń
room acoustics
spatial decay curve
reverberation time
acoustic pressure
acoustic properties
Opis:
W artykule przedstawiono wyniki czasu pogłosu, spadku poziomu ciśnienia akustycznego w przestrzeni z podwojeniem odległości DL2 i nadwyżki poziomu ciśnienia akustycznego DLf otrzymane z obliczeń symulacyjnych oraz z pomiarów dla holu i przestrzeni multimedialnej w budynku szkolnym.
This paper presents the results of spatial decay in hall, obtained using numerical techniques. They were compared with measurements data of this parameter in real room.
Źródło:
Fizyka Budowli w Teorii i Praktyce; 2011, T. 6, nr 2, 2; 41-45
1734-4891
Pojawia się w:
Fizyka Budowli w Teorii i Praktyce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Double Synthetic Index to Evaluate the Acoustics of Churches
Autorzy:
Berardi, U.
Powiązania:
https://bibliotekanauki.pl/articles/176645.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
worship acoustics
acoustic quality
synthetic index
listening preference
Opis:
Several authors have proposed indices to synthesize the acoustics of a space, especially of concert halls. Meanwhile, a few studies have focused on the acoustics of worship spaces. The peculiarities of these last ones have shown distinctive characteristics. The increasing interest for the acoustics of worship spaces justifies the formulation of indices to synthesize the results of acoustic studies in these buildings too. This paper proposes a double synthetic index to evaluate the acoustics of a church. The index is obtained combining the average values of seven parameters generally considered in studies of architectural acoustics. The differences between requirements for music and speech in churches suggest to consider different optimal values of the selected parameters for different kinds of sound. A double synthetic index has been defined to synthesize the acoustical properties related to the music and to the speech separately. The validity of this double index is then assessed, comparing its values with subjective preferences captured through listening tests. The index, which is proposed and validated in this paper, aims to be an instrument to show synthetically the acoustical characteristics of a church to people with low knowledge in acoustics.
Źródło:
Archives of Acoustics; 2012, 37, 4; 521-528
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustic Rehabilitation of the Church of Santa Ana in Moratalaz, Madrid
Autorzy:
Bueno, A. M.
León, A. L.
Galindo, M.
Powiązania:
https://bibliotekanauki.pl/articles/176614.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
worship acoustics
acoustic simulation
sound-reinforcement
acoustic rehabilitation
Opis:
The church of Santa Ana in Moratalaz, Madrid, Spain (1965–1971), is an emblematic work of the architect Miguel Fisac. In his long career include interventions in the religious field, constituting one of the most important contributions to Spanish religious architecture of the last century. This church is a singular place of worship and architecturally significant, in which the acoustics played an important role in the configuration of the spatiality of the church. This paper studies the acoustic behaviour of the church and its relationship with its unique structural, spatial and coating material characteristics. The analysis of the current acoustic conditions, with high reverberation times (up to 6 seconds) and poor intelligibility on the audience, serve as the basis for making an acoustic rehabilitation proposal that contributes to improving the sound conditions of the building for the intended use, without distorting the spatial, formal and material aspects with which the architect conceived the project.
Źródło:
Archives of Acoustics; 2012, 37, 4; 435-446
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures
Autorzy:
Miśkiewicz, A.
Rogala, T.
Rościszewska, T.
Rudzki, T.
Fidecki, T.
Powiązania:
https://bibliotekanauki.pl/articles/177211.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sound clarity
room acoustics
psychoacoustics
Opis:
The purpose of the study was to compare auditory judgments of sound clarity of music examples recorded in a concert hall with predictions of clarity made from the impulse response signal recorded in the same hall. Auditory judgments were made with the use of two methods: by rating sound clarity on a numerical scale with two endpoints, and by absolute magnitude estimation. Results obtained by both methods were then compared against the values of clarity indices, C80 and C50, determined from the impulse response of the concert hall, measured in places in which the microphone was located during recording of music examples. Results show that auditory judgments of sound clarity and predictions made from the C80 index yield a similar rank order of data, but the relation between the C80 scale and perceived sound clarity is nonlinear. The data also show that the values of C80 and C50 indices are in very close agreement.
Źródło:
Archives of Acoustics; 2012, 37, 1; 41-46
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of the Sound Absorption Coefficient of Auditorium Seats for Various Geometries of the Samples
Autorzy:
Rubacha, J.
Pilch, A.
Zastawnik, M.
Powiązania:
https://bibliotekanauki.pl/articles/176676.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sound absorption
room acoustics
modelling of acoustic parameters
Opis:
This paper presents the results of measurements of the sound absorption coefficient of auditorium seats carried out in the laboratory using two methods. In the first one, small blocks of seats in various arrangements were studied in a reverberation chamber to determine the absorption coefficient of an auditorium of infinite dimensions. The results were compared to the values of the absorption coefficient measured using the second method, which involved samples enclosed within a frame screening the side surfaces of other auditorium blocks. The results of both methods allowed for the assessment of the sound absorption coefficient of an auditorium of any dimensions while taking into account the sound absorption by the side surfaces. The method developed by the authors will simplify the currently known measurement procedures.
Źródło:
Archives of Acoustics; 2012, 37, 4; 483-488
0137-5075
Pojawia się w:
Archives of Acoustics
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:
Subjective Assessment of Concert Halls: a Common Vocabulary for Music Lovers and Acousticians
Autorzy:
Giménez, A.
Cibrian, R. M.
Cerda, S.
Powiązania:
https://bibliotekanauki.pl/articles/176648.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
room acoustics
subjective evaluation
Opis:
In recent years we have interviewed members of the audience after musical performances and asked them to evaluate the acoustics of the concert halls. A group of "music lovers" (with a high level of musical training and experience) and "acousticians" (with a wide knowledge of the physical characteristics of sound transmission) also attended each performance and answered the same questions as the general public. This group thereby served as a control group when evaluating surveys of the general public. In this paper, the results obtained when analyzing these control group surveys are presented. This analysis shows that a common vocabulary exists between music lovers and acousticians when rating a hall, although the grouping of the questions for each factor depends on the training of the respondents.
Źródło:
Archives of Acoustics; 2012, 37, 3; 331-340
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Virtual Acoustics at the Service of Music Performance and Recording
Autorzy:
Woszczyk, W.
Ko, D.
Leonard, B.
Powiązania:
https://bibliotekanauki.pl/articles/177293.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
virtual acoustics
active acoustic architecture
room acoustics
room impulse respons
low-latency convolution
performer-room interaction
music recording
acoustic enhancement
active acoustics
Opis:
Virtual or active acoustics refers to the generation of a simulated room response by means of elec- troacoustics and digital signal processing. An artificial room response may include sound reflections and reverberation as well as other acoustic features mimicking the actual room. They will cause the listener to have an impression of being immersed in virtual acoustics of another simulated room that coexists with the actual physical room. Using low-latency broadband multi-channel convolution and carefully measured room data, optimized transducers for rendering of sound fields, and an intuitive touch control user in- terface, it is possible to achieve a very high perceived quality of active acoustics, with a straightforward adjustability. The electroacoustically coupled room resulting from such optimization does not merely produce an equivalent of a back-door reverberation chamber, but rather a fully functional complete room superimposed on the physical room, yet with highly selectable and adjustable acoustic response. The utility of such active system for music recording and performance is discussed and supported with examples.
Źródło:
Archives of Acoustics; 2012, 37, 1; 109-113
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 41

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