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Understanding chair absorption characteristics using the perimeter-to-area method

机译：使用周边到区域方法了解椅子的吸收特性

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摘要

Measurements of the sound absorption of several blocks of chairs with varied perimeter-to-area (PIA) ratios were used to examine how chair absorption coefficients are related to their physical characteristics. Because the P/A method combines the results of several samples of each type of chair, a more accurate understanding can be obtained of how the physical properties of the chairs are related to their sound absorption characteristics. Unoccupied chairs are shown to have a wide range of characteristics and it is necessary to test each type of chair to accurately predict their effect in an auditorium. However, the absorption characteristics of occupied chairs are strongly influenced by the absorption of the occupants and an approximate average sound absorption characteristic can be useful for predicting the effect of occupied chairs in an auditorium. Although the variations of sound absorption with row spacing are related to PI A, the variations are quite different than when simply changing the PjA for chair samples with constant row spacing. Both chair underpass height and chair back height affect the absorption characteristics of theater chairs, but the effects can be influenced by the presence of carpet under the chairs or by occupants in the chairs. Common sources of increased sound absorption in each octave band are identified and discussed.
机译：测量了具有不同周长比（PIA）的几块椅子的吸声率，以检查椅子的吸声系数如何与其物理特性相关。由于P / A方法结合了每种椅子的几个样本的结果，因此可以更准确地了解椅子的物理特性与它们的吸声特性之间的关系。空椅子具有广泛的特性，必须测试每种类型的椅子以准确预测其在礼堂中的效果。然而，占用椅子的吸收特性受乘员吸收的强烈影响，并且近似平均声音吸收特性可用于预测观众席中占用椅子的效果。尽管声音吸收随行距的变化与PI A有关，但与仅更改具有恒定行距的椅子样品的PjA时，该变化却大不相同。椅子的地下通道高度和椅子的靠背高度都会影响剧院椅子的吸收特性，但是影响可能会受到椅子下面地毯的存在或椅子上乘客的影响。确定并讨论了每个八度音带中增加的声音吸收的常见来源。

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  • 来源
    《Applied Acoustics》 |2013年第9期|1060-1068|共9页
  • 作者

    John S. Bradley; Young-Ji Choi; Dae-Up Jeong;

  • 作者单位

    Institute for Research in Construction, National Research Council, 1200 Montreal Rd., Ottawa, Canada KIAS 0R6;

    Department of Architectural Engineering, Chonbuk National University, 664-14 IGa, Duckjin-Dong, Duckjin-Cu, Jeonju, Jeonbuk 561-156, Republic of Korea;

    Department of Architectural Engineering, Chonbuk National University, 664-14 IGa, Duckjin-Dong, Duckjin-Cu, Jeonju, Jeonbuk 561-156, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Perimeter-to-area; Theater chairs; Absorption coefficients;

    机译：周边到区域;剧院椅;吸收系数;

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