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A NEWLY DEVELOPED HEARING RISK DOSIMETER AND ITS APPLICATION TO THE HEARING DAMAGE RISK ASSESSMENT

Research Project

Project/Area Number 08670468
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Public health/Health science
Research InstitutionTHE INSTITUTION FOR SCIENCE OF LABOUR

Principal Investigator

ITO Akiyoshi  THE INSTITUTE FOR SCIENCE OF LABOUR,RESEARCH DEPARTMENT,SENIOR RESEARCHER, 研究部, 主任研究員 (30151492)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsNOISE EXPOSURE / HEARING ACUITY / TEMPORARY THRESHOLD SHIFT / RISK ASSESSMENT / PERSONAL MONITORING / 騒音ばく露 / 個人モニタリング
Research Abstract

A operation unit for hearing risk dosimeter was newly developed to calculate rapidly the estimated noise induced temporary threshold shift (NITTS). This dosimeter is expected to contribute to the hearing damage risk assessment of personal noise exposure.
The unit has six built-in filters that are A-weighted filter and five band-pass filters for the critical bands of NITTS for 2,3,4,6 and 8 kHz, and the DC voltage output of 0-1 V in proportion to a sound pressure level of each filter can be taken out. A dynamic range for input level is 50 dB and is changeable at 3 phases of 50-100, 60-110 and 70-120 dB, The size of the unit was small in 60 mm X 100 mm X 25 mm with weight of approximately 200 g.
At the print workplace by a high speed rotary press, a worker wore both the new dosimeter and the personal noise dosimeter using a portable digital audio tape recorder (DAT) which had been already developed and in practical use. The results showed that the values of critical band levels for NITTS measure by the new dosimeter and estimated NITTS values well agreed with those of the former dosimeter. Therefore, this unit would be used practically for a personal noise dosimeter at work. It would also contribute to shorten the analysis time largely which had been as long as the recorded time in case of the former dosimeter using DAT.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] Akiyoshi ITO: "A newly developed hearing risk dosimeter and its application to the noise management at work." SANGYO EISEIGASKU ZASSHI. 40(Suppl). 521 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 伊藤 昭好: "聴力リスク計の開発と現場の騒音管理への応用" 産業衛生学雑誌. 40・臨. 521 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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