Acoustic Design of a Classical Concert Hall and Evaluation of its Acoustic Performance – A Case Study

This study aims at an acoustic design of the classical concert hall and evaluation of the acoustic performance. In terms of three acoustic parameters (i.e., reverberation time (RT), clarity (C80), and lateral fraction (LF)), this study performed acoustic simulation modeling and site measurement with the K Art Hall located in South Korea as a case study. First, in order to meet the acoustic performance of the K Art Hall (target RT: 1.4~1.7 seconds, target C80: -2dB or more +2dB or less, and target LF: 10~35%), the finish materials and shape of the room as an interior acoustic design were determined. Second, the average values of the RT, C80, and LF using the acoustic simulation modeling were estimated at 1.4 second, 1.2~1.6 dB, and 29%, respectively. Third, the average values of the RT, C80, and LF through site measuring were measured at 1.5~1.64 second, 0.07~1.31dB, and 22.22~31.37%, respectively. Thus, the results of both the acoustic simulation modeling and site measuring were analyzed so as to satisfy the target acoustic performance. The results of this study will help the decision-makers (i.e., owner, construction managers, etc.) to plan the classical concert hall in terms of the RT, C80, and LF.

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Concert hall: acoustic design comparing analytical results and ray tracing

INTER-NOISE and NOISE-CON Congress and Conference Proceedings ◽

10.3397/in-2021-2445 ◽

2021 ◽

Vol 263 (3) ◽

pp. 3538-3544

Author(s):

Karina Sá ◽

Raquel Rossatto Rocha ◽

Bárbara Fengler

Keyword(s):

Ray Tracing ◽

Reverberation Time ◽

Acoustic Parameters ◽

Concert Hall ◽

Acoustic Design ◽

Analytical Results ◽

Strategic Location ◽

Acoustic Quality ◽

Plan Study

With the intention of designing architecture for music and inspired by music, the J.C. Martins Concert Hall was created with 1008 seats and an approximate volume of 49400 ft³. Among all the architectural aspects considered, such as strategic location analyzed from the mass plan, study of volumetries, acoustics is the highlight due to its importance and complexity of the project. The Concert Hall is the object of the present study, the purpose of the article is to compare the simulated results in the EASE software with the analytical results of the reverberation time calculated by the Sabine and Eyering equations for the Concert Hall. Acoustic parameters such as reverberation time, clarity, among others, were simulated to verify the acoustic quality of the room in question. With that, it was possible to analyze and discuss the limitations of the analytical method and the simulations. Even so, the results were satisfactory to reach the adequated indexes of the acoustic parameters.

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Reverberation time improvement of lecture auditorium: A case study

Noise & Vibration Worldwide ◽

10.1177/0957456517748448 ◽

2018 ◽

Vol 49 (1) ◽

pp. 14-19

Author(s):

Saurabh Yadav ◽

Gaurav Sharma ◽

Sarthak Nag ◽

Arpan Gupta

Keyword(s):

Speech Intelligibility ◽

Indian Institute ◽

Experimental Results ◽

Reverberation Time ◽

Acoustic Performance ◽

Institute Of Technology

In this study, reverberation time of a lecture auditorium has been analyzed experimentally and analytically. It is well-known fact that reverberation time affects the speech intelligibility and hence should be within the range of possible optimum values. Experiments were performed to calculate the reverberation time of a lecture auditorium constructed at Indian Institute of Technology Mandi (IIT Mandi), for different internal conditions such as furniture and curtains. Experimental results were compared with the theoretically calculated values of reverberation time. It is found that acoustic performance of the lecture auditorium has significantly improved using curtains on the windows and furniture. For further improvement, it has also been suggested to use the carpet on the floor of the auditorium. The theoretical value of reverberation time is also calculated to show the improvement which can be achieved using carpet. The effect of audience on reverberation time has also been studied theoretically.

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From Architectural Acoustics to Acoustical Architecture Using Computer Simulation

Building Acoustics ◽

10.1260/1351010054037965 ◽

2005 ◽

Vol 12 (2) ◽

pp. 85-98 ◽

Cited By ~ 1

Author(s):

Anne Marie Due Schmidt ◽

Poul Henning Kirkegaard

Keyword(s):

Design Process ◽

Architectural Design ◽

Acoustic Properties ◽

Architectural Acoustics ◽

Acoustic Design ◽

Advantages And Disadvantages ◽

Acoustic Simulation ◽

Set Up ◽

The Right

Architectural acoustics design has in the past been based on simple design rules. However, with a growing complexity in architectural acoustics and the emergence of room acoustic simulation programmes with considerable potential, it is now possible to subjectively analyse and evaluate acoustic properties prior to the actual construction of a building. With the right tools applied, acoustic design can become an integral part of the architectural design process. The aim of this paper is to investigate the field of application that an acoustic simulation programme can have during an architectural acoustic design process and to set up a strategy to develop future programmes. The emphasis is put on the first three out of four phases in the working process of the architect and a case study is carried out in which each phase is represented by typical results – as exemplified with reference to the design of Bagsvaerd Church by Jørn Utzon. The paper discusses the advantages and disadvantages of the programme in each phase compared to the works of architects not using acoustic simulation programmes. The conclusion of the paper points towards the need to apply the acoustic simulation programmes to the first phases in the architectural process and set out a reverse strategy for simulation programmes to do so – from developing acoustics from given spaces to developing spaces from given acoustics.

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Listeners Sensitivity to Different Locations of Diffusive Surfaces in Performance Spaces: The Case of a Shoebox Concert Hall

Applied Sciences ◽

10.3390/app10124370 ◽

2020 ◽

Vol 10 (12) ◽

pp. 4370

Author(s):

Louena Shtrepi ◽

Sonja Di Blasio ◽

Arianna Astolfi

Keyword(s):

Reference Conditions ◽

Design Parameters ◽

Acoustic Parameters ◽

Sound Perception ◽

Concert Hall ◽

Acoustic Design ◽

Rear Part ◽

Concert Halls ◽

Surface Location ◽

Omnidirectional Microphones

Diffusive surfaces are considered as one of the most challenging aspects to deal with in the acoustic design of concert halls. However, the acoustic effects that these surface locations have on the objective acoustic parameters and on sound perception have not yet been fully understood. Therefore, the effects of these surfaces on the acoustic design parameters have been investigated in a real shoebox concert hall with variable acoustics (Espace de Projection, IRCAM, Paris, France). Acoustic measurements have been carried out in six hall configurations by varying the location of the diffusive surfaces over the front, mid, and rear part of the lateral walls, while the other surfaces have been maintained absorptive or reflective. Moreover, two reference conditions, that is, fully absorptive and reflective boundaries of the hall have been tested. Measurements have been carried out at different positions in the hall, using an artificial head and an array of omnidirectional microphones. Conventional ISO 3382 objective acoustic parameters have been evaluated in all conditions. The results showed that the values of these parameters do not vary significantly with the diffusive surface location. Moreover, a subjective investigation performed by using the ABX method with auralizations at two listening positions revealed that listeners are not sensitive to the diffusive surface location variations even when front-rear asymmetric conditions are compared. However, some of them reported perceived differences relying on reverberance, coloration, and spaciousness.

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Evaluation of Sound Comfort in Examination Hall Using Acoustical Environmental Analyses

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.315.825 ◽

2013 ◽

Vol 315 ◽

pp. 825-829

Author(s):

M. Mohd Amran ◽

M. Shaiful Rizal ◽

I. Maznan ◽

Mohd Nazrul Roslan ◽

Y. Musli Nizam ◽

...

Keyword(s):

Noise Level ◽

Background Noise ◽

Sound Pressure ◽

Reverberation Time ◽

Acoustic Parameters ◽

Acoustic Performance ◽

Absorbent Material ◽

Background Noise Level ◽

Wall Condition ◽

A Minor

Acoustics environmental analyses were conducted in the unoccupied examination hall at Universiti Tun Hussein Onn Malaysia (UTHM), in order to determine the acoustical environment which reflects to sound comfort during sitting exam. The acoustic parameters that measured are background noise level, sound pressure level and reverberation time. The analysis result of untreated wall condition (without absorbent material) was revealed poor while treated wall condition (with absorbent material) revealed the improvement result. Installation of absorbent material on the wall and speakers rearrangement had reduced the highest background noise level of examination hall average reverberation times. A minor alteration at examination hall had contributed to better acoustic performance.

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The Accuracy of Predicted Acoustical Parameters in Ancient Open-Air Theatres: A Case Study in Syracusae

Applied Sciences ◽

10.3390/app8081393 ◽

2018 ◽

Vol 8 (8) ◽

pp. 1393 ◽

Cited By ~ 7

Author(s):

Elena Bo ◽

Louena Shtrepi ◽

David Pelegrín Garcia ◽

Giulio Barbato ◽

Francesco Aletta ◽

...

Keyword(s):

Modelling And Simulation ◽

Just Noticeable Difference ◽

Reverberation Time ◽

Impulse Responses ◽

Acoustical Parameters ◽

Acoustic Parameters ◽

Scattering Coefficients ◽

Different Types ◽

Good Agreement

Nowadays, ancient open-air theatres are often re-adapted as performance spaces for the additional historical value they can offer to the spectators’ experience. Therefore, there has been an increasing interest in the modelling and simulation of the acoustics of such spaces. These open-air performance facilities pose several methodological challenges to researchers and practitioners when it comes to precisely measure and predict acoustical parameters. Therefore this work investigates the accuracy of predicted acoustical parameters, that is, the Reverberation Time (T20), Clarity (C80) and Sound Strength (G), taking the ancient Syracusae open-air theatre in Italy as a case study. These parameters were derived from both measured and simulated Impulse Responses (IR). The accuracy of the acoustic parameters predicted with two different types of acoustic software, due to the input variability of the absorption and scattering coefficients, was assessed. All simulated and measured parameters were in good agreement, within the range of one “just noticeable difference” (JND), for the tested coefficient combinations.

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Case Study: Acoustic Design of a Restored Theatre in Thessaloniki

Building Acoustics ◽

10.1260/1351010001501552 ◽

2000 ◽

Vol 7 (2) ◽

pp. 137-150

Author(s):

N. P. Tsinikas

Keyword(s):

Background Noise ◽

Lateral Wall ◽

Reverberation Time ◽

Noise Levels ◽

Acoustic Design ◽

Design Changes ◽

Wire Frame ◽

Measurement Results ◽

Side Walls

This paper discusses the acoustics of a restored theatre in Thessaloniki, Greece. The paper presents the acoustic design principles, discusses the employment of these principles and concludes with an assessment of the success of the design. The acoustic design changes included improvement of direct sound, provision of ceiling and walls reflections, positioning of diffusers, optimising reverberation time and minimising background noise levels. Steeper seating rakes were constructed in the stalls, boxes and balconies. Curved ceiling reflectors were positioned in a new wire frame false ceiling. Lateral wall reflectors were introduced, as were curved side walls near the stage to act as diffusers. Diffusers were positioned in the rear walls and in balcony fronts. Reverberation times were predicted, measured and compared with earlier data, based on the change of volume, the number and design of seats and the volume per seat ratio. Finally, noise level measurements were obtained in most of the spaces in the theatre. Assessment of the success of the design is based on measurement results and on the subjective acceptance by theatre goers.

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Rule Invention in the Acquisition of Morphology Revisited

Journal of Speech Language and Hearing Research ◽

10.1044/jshr.3103.425 ◽

1988 ◽

Vol 31 (3) ◽

pp. 425-431 ◽

Cited By ~ 7

Author(s):

Stephen M. Camarata ◽

Lisa Erwin

Keyword(s):

Language Acquisition ◽

Active Role ◽

Acoustic Parameters ◽

Impaired Child ◽

Language Impaired ◽

Intensity Parameters ◽

Suprasegmental Features ◽

Acoustic Analyses ◽

Suprasegmental Cues

This paper presents a case study of a language-impaired child who signaled the distinction between English singular and plural using suprasegmental cues rather than the usual segmental form used within the parent language. Acoustic analyses performed within the first study in the paper revealed that the suprasegmental features used to maintain this distinction included various duration, fundamental frequency, and intensity parameters. Acoustic analyses Were also performed on a set of matched two- and four-item plural forms within a second study. The results of these analyses indicated that the same acoustic parameters were used to distinguish two-item plural forms from four-item plural forms. This case of linguistic creativity is offered as further evidence in support of the model of language acquisition that emphasizes the active role children take in the acquisition process. Additionally, the phonological, morphological, and psycholinguistic factors that may contribute to such rule invention are discussed.

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