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A Study of Acoustical Design of Under-Balcony Space in Auditoria

Research Project

Project/Area Number 06650657
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Architectural environment/equipment
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

FUJIMOTO Kazutoshi  Faculty of Eng., Dept.of Architecture, Associate professor, 工学部, 助教授 (90112309)

Co-Investigator(Kenkyū-buntansha) FURUYA Hiroshi  Kyushu Kyoritsu University, Dept.of Architecture, Lecturer, 工学部, 講師 (00238700)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1994: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsRoom Acoustics / Under-Balcony Space / Auditory Envelopment / Computer Simulation / Psycho-Acoustical Experiment / Early Reflections / Acoustical Design Criteria / コンピュータシミュレーション / オ-ディトリウム / バルコニー下部空間 / 音響測定 / 空間的印象
Research Abstract

The purpose of this study is to make clear the relation between the shape of balcony and acoustical properties under the overhang, and ultimately to derive an acoustic design criteria for balcony configuration is auditoria. On the assumption that a physical change of the sound field caused by building a balcony would be primarily a reduction of the energy of early reflections from upside, the directional characteristics of early reflections under the balcony is measured. The results show that the ratio of vertical component to total early reflection energy is very small under the overhang. Then psycho-acoustical experiments by using the measured data are perfoemed. The results show that auditory envelopment becomes stronger as the vertical component of reflected energy increases while lateral energy fraction is constant. Next. impulse responses are calculated in models of auditorium by means of computer simulation based on geometrical acoustics when the depth and the height of balcony-opening are varied. The evident effect of overhang can not be found in basic acoustical indices (SPL,C_<80>, TS and LE). This means that another index is necessary for evaluating the lack of auditory envelopment which is often perceived under the balcony. The directional characteristics of early reflections are examined. As a result, the relation between the configuration index of d/h and the ratio of vertical component to total early reflection energy ERv is obtained, where d and h are geometrically defined by the positions of sound source, receiving point and balcony edge. Applying the difference Iimen of ERv to this relation, it is found thet the maximum limit of d/h, in which the degree of auditory envelopment under the overhang is equivalent to that in main orchestra, is between 0.7 and 1.0. It can be thought that this is a design criteria of balcony in auditoria.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (33 results)

All Other

All Publications (33 results)

  • [Publications] 古屋浩: "オ-ディトリウムにおけるバルコニー下部空間の初期反射音特性" 日本音響学会講演論文集. 秋. 947-948 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 竹島義人: "上方からの初期反射音が空間的印象に与える影響-残響音を付加した場合-" 日本音響学会講演論文集. 秋. 997-998 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 古屋浩: "オ-ディトリウムにおけるバルコニー下部空間の初期反射音特性と聴感印象" 電子情報通信学会技術研究報告. EA94-76. 7-14 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 古屋浩: "Effect of early reflections from upside on auditory envelopment" Journal of Acoustical Society of Japan(E). Vol.16. 97-104 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 竹島義人: "オ-ディトリウムにおけるバルコニー下部空間の初期反射音特性" 日本建築学会九州支部研究報告. 第35号. 53-56 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 竹島義人: "上方からの初期反射音が空間的印象に与える影響" 日本建築学会大会学術講演梗概集. 環境工学. 69-70 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 古屋浩: "上方からの初期反射音による音に包まれた感じの弁別閾" 日本音響学会講演論文集. 秋. 791-792 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 古屋浩: "上方からの初期反射音が空間的印象に与える影響" 日本音響学会建築音響研究会. AA96-9. 1-7 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 豊村敦: "オ-ディトリウムのバルコニー形態と初期反射音特性(その1)室内音響諸量の解析結果" 日本建築学会中国・九州支部研究報告. 第10号. 53-60 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 竹島義人: "オ-ディトリウムのバルコニー形態と初期反射音特性(その2)初期反射音の方向特性" 日本建築学会中国・九州支部研究報告. 第10号. 57-60 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 古屋浩: "オ-ディトリウムのバルコニー形態と初期反射音特性" 九州大学工学集報. 第69巻第3号(印刷中). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] FURUYA Hiroshi and FUJIMOTO Kazutoshi et al.: "Acoustical characteristics of early reflections under the balcony in auditoria" Tech.Rep.of ASJ 94, Aut.947-948 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] TAKESHIMA Yoshito and FUJIMOTO Kazutoshi et al.: "Effects of early reflections from upside on auditory impression in the presence of reverberation" Tech.Rep.of ASJ 94, Aut.997-998 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] FURUYA Hiroshi and FUJIMOTO Kazutoshi et al.: "Acoustical characteristics of early reflections and suditory impression of envelopment under the balcony in auditoria" Tech.Rep.of IEIC. EA94-76. 7-14 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] FURUYA Hiroshi and FUJIMOTO Kazutoshi et al.: "Effects of early reflections from upside on auditory envelopment" JASA (E). Vol.16. 97-104 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] TAKESHIMA Yoshito and FUJIMOTO Kazutoshi et al.: "Acoustical characteristics of early reflections under the balcony in auditoria" Tech.Rep.of AIJ Kyushu. 35. 53-56 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] TAKESHIMA Yoshito and FUJIMOTO Kazutoshi et al.: "Effect of early reflections from upside on auditory envelopment" Tech.Rep.of AIJ 95. 69-70 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] FURUYA Hiroshi and FUJIMOTO Kazutoshi et al.: "jnd of ratio vertical component to total early reflection energy on auditory envelopment" Tech.Rep.of ASJ 95, Aut.791-792 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] FURUYA Hiroshi and FUJIMOTO Kazutoshi et al.: "Effects of early reflections from upside on auditory impression of envelopment" AA Rep.of ASJ. AA96-9. 1-7 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] TOYOMURA Atsushi and FUJIMOTO Kazutoshi et al.: "The shape of balcony and characteristics of early reflections in auditoria Part 1 The relation of calculating acoustical indices" Tech.Rep.of AIJ Kyushu & Cyugoku. 10. 53-56 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] TAKESHIMA Yoshito and FUJIMOTO Kazutoshi et al.: "The shape of balcony and characteristics of early reflections in auditoria Part 2 Directional characteristics of early reflections" Tech.Rep.of AIJ Kyushu & Cyugoku. 10. 57-60 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] FURUYA Hiroshi and FUJIMOTO Kazutoshi et al.: "Relation between the configuration of balcony and the characteristics of early reflections in auditoria" Tech.Rep.of Kyushu University. Vol.69 (to be published). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 古屋浩: "Effect of early reflections from upside on auditory envelopment" Journal of Acoustical Society of Japan (E). Vol. 16. 97-104 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 竹島義人: "オ-ディトリウムにおけるバルコニー下部空間の初期反射音特性" 日本建築学会九州支部研究報告. 第35号. 53-56 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 竹島義人: "上方からの初期反射音が空間的印象に与える影響" 日本建築学会大会学術講演梗概集. 環境工学. 69-70 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 古屋浩: "上方からの初期反射音による音に包まれた感じの弁別閾" 日本音響学会講演論文集. 秋. 791-792 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 古屋浩: "上方からの初期反射音が空間的印象に与える影響" 日本音響学会建築音響研究会. AA96-9. 1-7 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 豊村敦: "オ-ディトリウムのバルコニー形態と初期反射音特性(その1)室内音響諸量の解析結果" 日本建築学会中国・九州支部研究報告. 第10号. 53-56 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 竹島義人: "オ-ディトリウムのバルコニー形態と初期反射音特性(その2)初期反射音の方向特性" 日本建築学会中国・九州支部研究報告. 第10号. 57-60 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 古屋浩: "オ-ディトリウムのバルコニー形態と初期反射音特性" 九州大学工学集報. 第69巻第3号(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 古屋浩: "オ-ディトリウムにおけるバルコニー下部空間の初期反射音特性" 日本音響学会講演論文集. 1994. 947-948 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 竹島義人: "上方からの初期反射音が空間的印象に与える影響-残響音を付加した場合-" 日本音響学会講演論文集. 1994. 997-998 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 古屋浩: "オ-ディトリウムにおけるバルコニー下部空間の初期反射音特性と聴感印象" 電子情報通信学会技術研究報告. EA94-76. 7-13 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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