An archaeoacoustic study on shape: the case study of the Iffland Theatre’s history (1802–1817)

IF 1 3区 物理与天体物理 Q4 ACOUSTICS Acta Acustica Pub Date : 2023-01-01 DOI:10.1051/aacus/2023046
Barteld N.J. Postma, Brian F.G. Katz
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引用次数: 0

Abstract

Previous studies have discussed six pre-Sabine quantifiable guidelines employed in room acoustic design: voice directivity, audience rake, “echo theory”, stage acoustics, reverberation, and length, width, and height ratios. Around the turn of the 18th century, these notions led to two shapes that were theoretically regarded optimal for rooms with acoustical demands: ellipse and semi-circle. The first of these shapes to be tested was the ellipse in the design for the Iffland Theatre (1802–1817). As the resulting acoustics were notoriously poor, contemporary architects and acousticians discussed the grounds for the failed acoustics as well as possible corrections. Multiple subsequent halls were also based on lessons learned from this acoustic failure. As part of this archaeoacoustics research, geometric acoustic numerical simulations were employed to estimate the actual and renovated room acoustic conditions. Three configurations of the hall have been reconstructed. Results show that the hall’s shape led to sound focusing and that the rounded proscenium arch likely induced echoes. Proposed solutions of the time to increase the scattering or absorption appear unlikely to have solved the observed acoustic problems.
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形状的考古声学研究:以伊夫兰剧院历史(1802-1817)为例
之前的研究已经讨论了6个用于室内声学设计的可量化准则:声音指向性、观众比例、“回声理论”、舞台声学、混响以及长宽高比。大约在18世纪之交,这些概念导致了理论上被认为最适合声学要求的房间的两种形状:椭圆形和半圆形。这些形状中第一个被测试的是伊夫兰剧院(1802-1817)设计中的椭圆。由于由此产生的声学效果非常差,当代建筑师和声学家讨论了声学失败的原因以及可能的纠正措施。随后的多个大厅也是基于从这次声学失败中吸取的教训。作为考古声学研究的一部分,采用几何声学数值模拟来估计实际和改造后的房间声学条件。大厅的三种结构已经重建。结果表明,大厅的形状导致声音聚焦,圆形的舞台拱门可能会引起回声。提出的增加散射或吸收时间的解决办法似乎不太可能解决观测到的声学问题。
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来源期刊
Acta Acustica
Acta Acustica ACOUSTICS-
CiteScore
2.80
自引率
21.40%
发文量
0
审稿时长
12 weeks
期刊介绍: Acta Acustica, the Journal of the European Acoustics Association (EAA). After the publication of its Journal Acta Acustica from 1993 to 1995, the EAA published Acta Acustica united with Acustica from 1996 to 2019. From 2020, the EAA decided to publish a journal in full Open Access. See Article Processing charges. Acta Acustica reports on original scientific research in acoustics and on engineering applications. The journal considers review papers, scientific papers, technical and applied papers, short communications, letters to the editor. From time to time, special issues and review articles are also published. For book reviews or doctoral thesis abstracts, please contact the Editor in Chief.
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