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1、學(xué)生實驗報告(理工類)課程名稱:專業(yè)班級:學(xué)生學(xué)號:學(xué)生姓名:所屬院部:指導(dǎo)教師:2011——2012學(xué)年第2學(xué)期金陵科技學(xué)院教務(wù)處制實驗項目名稱:環(huán)境噪聲測量實驗實驗學(xué)時:4同組學(xué)生姓名:實驗地點:實驗日期:實驗成績:批改教師:批改時間:一、實驗?zāi)康暮鸵螅?)掌握噪聲測量的方法,對噪聲的大小有一個主觀的認(rèn)識(2)學(xué)會使用聲級計;(3)分析噪聲的大小與來源,得知建筑是否符合規(guī)定。二、實驗儀器和設(shè)備HS5633型聲級計三、實驗過程(1)測點的選擇:建筑物外1m處,高1.2m;(2)檢查聲級計的電池電力并采用校準(zhǔn)器對其進(jìn)行校準(zhǔn);(3)
2、測量應(yīng)在無風(fēng)雪、無雷電天氣,風(fēng)速5m/s以下進(jìn)行。大風(fēng)時應(yīng)停止測量;(4)記錄聲級計讀數(shù)值,保持聲級計在L檔,每隔5秒讀一個數(shù)值,共記錄200個數(shù)。四、實驗結(jié)果與分析原理:將記錄的200個數(shù)從大到小的順序排列,第20個數(shù)值就是L10,L10反映交通噪聲的峰值;第100個數(shù)值就是L50,第180個數(shù)值就是L90,L90反映背景噪聲值。等效聲級反映了在測量的時間內(nèi)聲能的平均分布情況。計算公式:Leq=L50+d2/60其中d=L10-L90測量得出數(shù)據(jù)(單位:db):167.72658.45157.07654.210152.412651
3、.415149.417648.1267.52758.45256.87754.210252.412751.315249.417748.0366.92858.45356.87854.110352.412851.315349.417847.8464.52958.35456.67954.010452.312951.015449.317947.7563.83058.35556.68053.910552.313050.915549.218047.5660.43158.25656.58153.810652.313150.715649.218147
4、.5760.43258.25756.58253.810752.213250.615749.218247.5860.13358.15856.48353.810852.213350.415849.218347.4959.73458.15956.38453.710952.113450.315949.118447.31059.73558.06056.38553.711052.113550.216049.118547.21159.63657.96156.28653.511152.113650.116149.018647.21259.53757
5、.96256.08753.511252.013750.116248.918747.01359.43857.86356.08853.511352.013850.116348.918846.91459.33957.86455.88953.511452.013950.016448.918946.91559.34057.76555.79053.511552.014049.916548.919046.81659.34157.76655.79153.411652.014149.916648.919146.71759.24257.66755.79
6、253.211751.914249.916748.819246.61859.04357.56855.49353.211851.914349.816848.719346.41958.94457.56955.39453.211951.914449.816948.719446.22058.94557.57055.39553.212051.814549.717048.719545.82158.94657.57155.09653.212151.814649.717148.619645.32258.84757.47254.99753.01225
7、1.614749.717248.619745.02358.74857.47354.89852.912351.614849.617348.519844.72458.74957.27454.69952.612451.514949.617448.519944.42558.55057.17554.310052.412551.515049.617548.120044.2依據(jù)測量的的數(shù)據(jù)得出:L10(在10%時最大噪音峰值)=58.9dbL50(在200個數(shù)據(jù)中最大平均值)=52.4dbL90(背景噪聲)=47.5Leq(等效聲級)=52.59
8、(Leq=L50+d2/60d2=L10-L90)分析:對照《城市區(qū)域環(huán)境噪聲標(biāo)準(zhǔn)》的校園1類的晝間等效聲級Leq<=55db,所以符合標(biāo)準(zhǔn)。