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DEVELOPMENT OF NOISE REDUCTION METHOD FOR GRAIN DRYERS

Research Project

Project/Area Number 04556037
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 農業機械
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

MURATA Satoshi  Agriculture, Kyushu University Professor, 農学部, 教授 (30038187)

Co-Investigator(Kenkyū-buntansha) NAKAJI Takashi  Agriculture, Assoc.Prof., 農学部, 助教授 (50128055)
KAWANO Toshio  Agriculture, Assist.Prof., 農学部, 助手 (60224812)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥10,700,000 (Direct Cost: ¥10,700,000)
Fiscal Year 1994: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1993: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥6,700,000 (Direct Cost: ¥6,700,000)
Keywordsnoise / phase inversion / noise contral / drying / dryer / drying facility / decibel / farm processing facility / デジベル
Research Abstract

The noize of 43 points around a unit dryer and 23 points in a country elevator were recorded.
In the laboratory tests we used FFT analyzer to analyze the frequence of sound before and after using reverse sound for the measuring points. we took seven samples, the 0,45,90,135 and 180 degrees of angle and the distance of 1,5m and 3.0m around the noise source and the reversed noise source of the speaker were measured and analyzed by the FFT.The results indicated from about 10 (dB) to 20 (dB) reduction of noize level by the reversed noise generation. The reversed noise by a speaker in the exhaust duct for dryng air actually reduced the exhaust noise by about 2 dB.
The similation of noize cancelation by reversed noise were developed, and using the recorded measured noise source the noise reduction characteristics similar to the preseding experimental results were obtained. The simulation was also suggestive of some effective method of noise control.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 村田 敏: "荷受けコンテナによる籾の乾燥(第2報)" 農業機械学会誌. 56巻1号. 13-20 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] TAGAWA,A.& MURATA,S.: "LATENT HEAT OF VAPORIZATION IN BUCKWHEAT" TRANSACTIONS OF THE ASAE. Vol.36No.1. 113-118 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 村田 敏: "食品溶液の凝固点降下の測定" 日本冷凍協会論文集. 10巻2号. 265-272 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 村田 敏: "白米とぎ汁の粒度分布の測定" 農業機械学会誌. 55巻5号. 141-145 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 村田 敏: "千切大根の乾燥特性-収縮を伴うみかけの減率乾燥-" 農業機械学会誌. 55巻4号. 83-89 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 村田 敏: "シリカゲル薄層の吸湿特性と固定層のシミュレーション" 農業機械学会誌. 55巻3号. 41-49 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 村田 敏・河野 俊夫・榎本 敏夫: "単層大豆の乾燥特性" 農業機械学会誌. 55. 51-56 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 村田 敏・宮内 樹代史: "Respiration Rate of Tthirteen Kinds of Fresh Vegetables" J.Fac.Agr.Kyushu Univ.197-207 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 村田 敏・山崎 信行・田中 史彦: "凍結下の化学反応速度の解析" 日本食品工業学会誌. 39. 972-975 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 村田 敏・田中 史彦: "食用油の蒸気圧の測定" 日本食品工業学会誌. 333-338 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 村田 敏・松岡 孝尚・宮内 樹代史: "ピーマンの重量分布の確率論と選果装置" 農業施設. 23. -6 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 村田 敏・小出 章二・河野 俊夫: "水浸時の精白米の裂傷に関する研究" 農業機械学会誌. 54. 67-72 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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