会议厅声环境优化研究

湖南大学硕士学位论文会议厅声环境优化研究姓名：熊艳申请学位级别：硕士专业：建筑技术科学指导教师：贺加添20050415IGBJ76-84GB/T4959-1995GYJ25-86IIAbstractThemeetingisanimportantorganizingandexchangeformforpeopleindailylive,obtainingimportantinformation,carringonacademicexchangeandsettingupinformationthatcommunicateeffectivelyandknowledgesharing.Withthedevelopmentofnationaleconomyinrecentyearsandasreformandopening-upisdeepenedfurther,heldingvariouskindsofmeetingsandcarriedonallkindsofacademicexchangeismorefrequently.Alotofgovernmentdepartments,institutionsofhighereducation,hotelsbuiltupconferencehallwithdifferentgradeanfunction.Andforalongtime,workersofarchitecturalacousticsofourcountryrelativelypayattentiontoperformingthebuildingandcarryingonacousticsresearchtosuchviewsasthemusichall,operahouse,etc.,andasoundofenvironmentresearchofthemeetinghallisveryfew.Solackthepracticalexperienceinthisrespect,theresearchaboutthisisverylimited,practiceandtheoreticalresearchcan'tmeetthecurrentneed.So,haveimportantmeaningstotheresearchoftheacousticenvironmentofconferencehall.Thearticlelaunchastudyonacousticenvironmentofconferencehallfromthreerespects:architecturalacoustics,expandingsoundsystemanddigitalmeetingsystem.Thesubjectofthearticleisformedbyfourpart:Analysethenecessitythatacousticdesigninconferencehall.Recommendthenumbersofreverberationwiththefirstpart;Analysedifferentlevelsandsectionalimpactonacousticfieldbytheacousticsmethodthatuserayacousticsandfluctuate.Haveintroducedthemethodofusingsound-absorbingmaterialandstructuretocarryonacousticsanddealwithtotheconferencehall.Thesecondpartlayontheinfluenceofchoiceofequipment,matchtoanalyse,systematicoverallarrangementexpandsoundstomeeting.Thethirdparthaveemphasizetheimportantfunctionatthemodernmeetingofthedigitalmeetingsystem,hasproposeddesignplansofmeetingofdifferentdemands.ThelastpartintroducesthedesignsoftwoprojectsofinternationalconferencehallandauditoriumofHunanUniversity,reflecttheapplicationintheactualschemeofresultofstudyofthethesis.KeyWordsAcousticEnvironment;ArchitecturalAcoustics;ExpandingSoundSystem;MeetingSystem1______2III2.142.242.352.472.582.692.7102.8102.9112.10112.11122.12122.13122.14122.15132.16132.17132.18132.19142.20142.21142.22152.23162.24162.25162.26182.279192.28202.29212.30213.3121IV2.32222.33222.34232.35233.1253.2353.3373.4373.5384.1424.2424.3444.4454.5474.6474.7HCS-3263484.8HCS-4100494.9504.10504.11514.12524.13524.14534.15534.16544.17544.18554.19564.20574.21574.22584.2345594.2490594.25594.2659V4.27604.28604.29615.1635.2645.3675.4695.5715.6725.7735.874VI2.182.2172.3NDC222.422242.521243.1293.2414.1454.2ITU-T474.3564.4614.5615.11.2mm675.2685.3685.4695.5705.6725.7725.8725.9725.10735.11735.12745.13755.147611211800021898(W.C.Sabine)219295050()195953m72m41370059m72m30330021250093000m31982199032001WTO20013APC422.1[1]%100×[2]2.13-61/81/10-1/202.2b2.1[1]2.252.2c2.3[4][5]++=RrDQLLWp44log1022maxπ(2.1)LpmaxdBLWdBQasaR−=1(2.2)aRSDAL%856.0200222=≤rrTVQnrTALc(2.3)ALAL15%Ts2.3[3]6rrcV200003.7r/rc3.16AL9T=33%,2.2160-7023452.3422.4500Hz0.5s-1.8s0.1s30m30.4s40000m31.9s7500Hz2.4[6][7]2.4.1lxlylz[8]tpczpypxp∂∂=∂∂+∂∂+∂∂22202222221(2.4)0)(),0(===lxxxxv0)(),0(===lyyyyv(2.5)0)(),0(===zxzzzvvx,vy,vxx,y,zcoscoscosnxyzjwtnnnnxyzpAkxkykze=(2.6)lnckxxxxπω==0,lnckxxxxπω==0,lnckzzzzπω==0,ωωωω2222zyxn++=2.4[2]8++=++==lnlnlncffffzzyyxxzyxnn222022222πω(2.7)nxnynz0nxnynz0nxnynzlxlylz7m102.11010001001111010124242434340111112000200023442505050222.5a7mx7mx7m6mx6mx9m2.592.5b6mx7mx8m2.5c3m,4.5m,6m182.22.2(Hz)(Hz)00128.602074.301038.010280.501147.702181.610057.200385.800257.211289.410163.901393.701268.602295.111068.612095.111174.312199.21810000257.2Hz01211068.6Hz02212085.1Hzlz=2lx2.6Vfc[8]cflcfScfVNcCC84342233++=ππ(2.8)Vm32.6[3]10Sm2lm)(4llllzyx++=(2.9)c340m/s100300Hz20Hz[9]100-200m32.4.22.4.2.1[10]2.72.8ABABCDCD2.72.8112.4.2.2”,112.930m2.9b22.1022.52.92.1012102.10b2.1132.122.1242.1352.1462.112.122.132.141322.152.161r2.172[11]2.1832.1942.152.172.162.18142.20HDH:D1.5[12]2.212.50.32.192.202.2115122.5.11[13][14]ab2.22ar;fraafafbar/2fbfa2122.232.2430mm40mm0.180mm100mm0.052.22[14]16=df0(2.10)f0Hzd32.2522.3200kg/m32.23[15]100kg/m313152.24[15]5~9%50mm461547)a2~5%50mm461535)b2.25[3]172.3[16]124080K25100mm34185NDCNDC62002.5.212.26[17][18]f0f0[14]VlScfπ200=(2.11)c0SlV2.26[24]192ff[14]Dlcfrσπ20=(2.12)Dbd2.27FC2.279[16]ABC2.28[20]202.29[3]31mm[19]1mm132.288cm12cm210.8mm800Hz240Hz4[21]f0[3]MKLMcf002021+=ρπ(2.13)M0kg/m2L(cm)(0.12kg/m3)c(340m/s)K(kg/m2s2)3-10mm2.29212.5.31NDCNDCNDCNDC1.2mm2.4NDC2.30NDC250Hz2.3150mm2.4NDC[22]/Hz/mm125250500100020004000500.120.340.580.810.820.641000.350.720.910.780.610.771500.300.840.880.710.580.592000.310.910.890.580.570.682.30[22]2.31[22]2222.32[23]F()STAR()STARF[24]2.333[25]2.341.02.5mm[26]2.352.32[23]2.33[24]232.35[25]2.5.42/33/42020m20.810.660.590.48601962[27]0.5m1.0m222.52.6Bradley[28][29]2.34[26]242.522[27]Hz1252505001000200040000.700.760.810.840.840.810.540.620.680.700.680.660.360.470.570.620.620.600.350.400.410.380.330.272.621[27]Hz1252505001000200040000.720.800.860.890.900.900.620.720.80