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  • 學位論文

動力機械之聲功率量測

Measurement of sound power for the power machines

指導教授 : 洪振發

摘要


動力機械產生的聲音大小可以其聲功率位準(sound power level)來表示,聲功率位準越大,聲音可以傳得越遠,在與機械相同距離下的聲壓位準(sound pressure level)就越大。聲功率量測上,很多國家採用ISO的規範,本研究旨在整理動力機械的聲功率量測方法,建立標準量測程序。 在真實量測時,實際音源的位置無法如點音源般擺放在指定位置(如量測中心),必然會有所偏差,本文探討以ISO 3744、ISO 3746、ISO 6393方法量測時待測物音源有偏移時,對量測到的聲功率位準之影響,並比對理論值和實際值的差別。 最後本研究對實際動力機械進行量測,以作為建立國內動力機械,包括營建工程機具的聲功率量測標準方法之參考。

並列摘要


The sound level of power machines can be indicated by sound power. The higher sound power level can propagate far distance, and higher sound pressure level. During the measurement, the position of sound source can’t locate in the specified point, e.g. the measurement center, there is surely a little displacement, this paper discussed the effects of the wrong position of sound source on the measurement according to ISO 3744、ISO 3746、ISO 6393. The results of theoretical and practical measurements were compared. Finally, the measurement of sound power, e.g. the air compressor and the earth removing machines were performed, we hope the standard measurement method of sound power for power machines which are including construction machines would be established.

參考文獻


[2] 范鎮富,1997,噪音特性對生理與心理影響之探討以半導體廠無塵室作業區
[6] ISO 3744:1994 Acoustics -- Determination of sound power levels of noise sources using sound pressure -- Engineering method in an essentially free field over a reflecting plane
[7] ISO 3746:1995 Acoustics -- Determination of sound power levels and sound energy levels of noise sources using sound pressure -- Survey method using an enveloping measurement surface over a reflecting plane
[11] 吳稚中,2007,土石流產生之地聲與空氣次聲特性之比較,國立成功大學,
[14] David T. Blackstock, 2000, Fundamentals of physical acoustics Wiley

被引用紀錄


王竑堯(2013)。高架橋軌道系統結構噪音分析〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2013.01384

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