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Development of TTS meter and evaluation on the hearing-effect of environmental sounds by using it

Research Project

Project/Area Number 09555169
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Civil and environmental engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

TAKAGI Koichi  Kyoto University, Engineering, Professor, 工学研究科, 教授 (50026077)

Co-Investigator(Kenkyū-buntansha) TAKINAMI Hiroaki  RION Co.Ltd., Aeoustic Engineering, Assistant manager, 音測技術部, 主任(研究職)
AONO Shoji  Kyoto University, Engineering, Instructor, 工学研究科, 助手 (40273479)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥8,300,000 (Direct Cost: ¥8,300,000)
Fiscal Year 1998: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1997: ¥5,900,000 (Direct Cost: ¥5,900,000)
KeywordsTTS / Environmental sound / Prediction / Critical band / テスト周波数 / 騒音 / 暴露実験
Research Abstract

We have developed a system which predicts TTS (Temporary Threshold Shift) in real time operation at actual noise induced fields. This system consists of a combination of a sound level meter with one-third-octave band filters and a multi-purpose personal computer.
At first, a calculation procedure was considered to enable real time operation. In this consideration, it was found that the predicted value of TTS can be presented as the convolutional summation of the critical band spectrum level for the test frequencies and the impulse response obtained from the existing prediction equations. For Takagi's Prediction Equation, a time delay in the growth of the predicted TTS was observed, when the applicable conditions were processed by the same procedure for steady noise. An appropriate procedure to remove the time delay for time-varying noise was also considered. By using this system, we evaluated the effects of some environmental sounds on hearing in terms of TTS.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 瀧浪弘章: "実時間でTTSを予測する測定器の開発-計算手順及び適用可能条件の検討" 騒音制御. 印刷中. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroaki Takinami: "Development of real-time operational TTS meter-Consideration of calculation procedures and applicable conditions-" Journal of INCE/J.(in printing). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 瀧浪弘章,青野正二,高木興一: "実時間でTTSを予測する測定器の開発-計算手順及び適用可能条件の検討-" 騒音制御. (発表予定). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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