Slot-perforated panel system proposal for variable acoustic solutions

Download

index.pdf

Date

2019

Author

Eşmebaşı, Merve

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

159
views

108
downloads

Performance spaces are often employed for various functions. These functions require different acoustical qualities and conditions of the hosting space needs altering to meet these requirements. There exist solutions in practice for that concern. These methods focus to change the amount of sound absorptive material in the hall rather than changing sound absorption characteristics of the system. Hence, they have drawbacks in terms of adaptability and versatility. As a potential answer to the shortcomings of these solutions, this study focuses on the crossroads between tuning capacity of perforated panels and requirements of flexible variable acoustic solutions. Effects of perforated panel’s design parameters on sound absorption capability of the system are studied. Furthermore, a prototype is developed to reveal the possibility of tuning a panel by controlling these parameters. Variations in sound absorption coefficients of the system are determined by impedance tube measurements. Maximum sound absorption coefficients are measured in 250 Hz and 2000 Hz for different panel positions. After the variable slot-perforated panel system is obtained, the system is tested on a case by computer simulations to demonstrate the capability of the proposal as a variable acoustic solution. The amphitheater of METU Faculty of Architecture Building as a small hall accommodating different functions is selected as a case and current acoustical condition of the hall are specified by field measurements. The hall is adapted to concert, musical and conference functions by the help of variable slotperforated panel proposal.

Subject Keywords

Architectural acoustics., Keywords: Perforated Panels, Variable Acoustics, Adaptive Volume Resonators, Acoustics of METU Architecture Amphitheatre.

URI

http://etd.lib.metu.edu.tr/upload/12624631/index.pdf
https://hdl.handle.net/11511/44554

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

An Approach on determining optimum acoustic conditions for Turkish classical music Torun, Tuna; Gönenç Sorguç, Arzu.; Department of Building Science in Architecture (2019) From past to present, performance spaces are being designed in order to provide better listening conditions according to their function. Rooms for classical music have different qualities in comparison to rooms for speech, for instance. However, while acoustic design regarding western-originated performances have been present for centuries, no such attempt has been made for Turkish classical music (TCM). This study aims to search for possible acoustic conditions that would complement the characteristics of ...
Perforated Panel System Proposal for Variable Acoustic Solutions Eşmebaşı, Merve; Tanyer, Ali Murat; Çalışkan, Mehmet (null; 2017-08-30) In this paper, a variable acoustic system proposal which provides a flexible adaptation range for different functions or audience sizes is investigated. In order to achieve the aimed variable acoustic system, perforated panel systems’ sound absorption capabilities are examined. Changes in perforation characteristics; hole shape, diameter, central distance and perforation ratio, studied with physical models throughout the research. The physical model is controlled by a digital interface which is designed by ...
Accuracy Barrier (ACCBAR): A novel performance indicator for binary classification Canbek, Gurol; Taşkaya Temizel, Tuğba; SAĞIROĞLU, ŞEREF (2022-01-01) Although several binary classification performance metrics have been defined, a few of them are used for performance evaluation of classifiers and performance comparison/reporting in the literature. Specifically, F1 and Accuracy (ACC) are the most known and conventionally used metrics. Despite their popularity and easy-to-understand characteristics, those metrics exhibit critical robustness issues. This paper suggests a new instrument category named 'performance indicators' and proposes a novel indicator na...
Segmentation Fusion for Building Detection Using Domain-Specific Information Karadag, Ozge Oztimur; Senaras, Caglar; Yarman Vural, Fatoş Tunay (2015-07-01) Segment-based classification is one of the popular approaches for object detection, where the performance of the classification task is sensitive to the accuracy of the output of the initial segmentation. Majority of the object detection systems directly use one of the generic segmentation algorithms, such as mean shift or k-means. However, depending on the problem domain, the properties of the regions such as size, color, texture, and shape, which are suitable for classification, may vary. Besides, fine tu...
Face segmentation in thermal images / Eryılmaz, Melis; Akar, Gözde; Department of Electrical and Electronics Engineering (2015) Automatic face segmentation is a key issue in many applications such as machine vision, coding, etc. Therefore, the accuracy of the segmentation algorithms results has a strong impact on the later stages. These algorithms should also be computationally efficient and robust against changing environments. The aim of this thesis is to analyze different approaches for face segmentation and compare them in terms of the robustness and computational efficiency. Four different face segmentation methods are chosen t...

Citation Formats

M. Eşmebaşı, “Slot-perforated panel system proposal for variable acoustic solutions,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Building Science in Architecture., Middle East Technical University, 2019.