year 13, Issue 1 (Journal of Acoustical Society of Iran 2025)
مجله انجمن علوم صوتی ایران (مهندسی صوتیات سابق) 2025, 13(1): 45-52 |
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ghaffari A, shahbazi Y, ilmakchi N. Acoustic Assessment of Large-Scale Spaces with Emphasis on Geodetic Geometry. مجله انجمن علوم صوتی ایران (مهندسی صوتیات سابق) 2025; 13 (1) : 5
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URL: http://joasi.ir/article-1-310-en.html
Abstract: (23 Views)
Due to the stability inherent in their spherical geometry, geodesic domes are among the few structures capable of spanning approximately 200 meters without auxiliary supports. However, issues with speech intelligibility within these spaces have hindered their adoption as the primary structural system for large-scale venues intended for acoustic purposes. This study's statistical population comprised all constructed geodesic domes with diameters exceeding 100 meters. From these, three domes representing low, medium, and high volume ranges were selected. Subsequently, by adjusting the radius-to-height (R/H) ratio of the domes to minimize the influence of other acoustic variables, the number of test samples was increased to nine. These samples were then evaluated based on key acoustic parameters: Reverberation Time (RT), Sound Pressure Level (SPL), Clarity (C50, C80), Definition (D50), Speech Transmission Index (STI), and Percentage of Articulation Loss of Consonants (Alcons). The results indicate that the sector form of the dome (i.e., the R/H ratio) significantly affects the investigated acoustic parameters. Furthermore, through an index-based analysis, it was concluded that the acoustic parameters related to Reverberation Time (RT) in the 250 and 500 Hz octave bands deviate from standard ranges. This finding can be influential in developing targeted solutions to improve acoustic conditions in such structures.
Article number: 5
Type of Study: Research |
Subject:
Structural Acoustics
Received: 2024/10/26 | Accepted: 2025/06/20 | Published: 2025/12/21
Received: 2024/10/26 | Accepted: 2025/06/20 | Published: 2025/12/21
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