基于噪音检测的自适应音量控制系统的研制

ELECTRONICMEASUREMENTTECHNOLOGY32420094*瞿少成艾宁徐海洋田瑶(华中师范大学信息技术系武汉430079):AT89S52,,,A/D;,,,,,,,:;;;AT89S52:TP273:ADesignofadaptivevolumecontrolsystembaseonnoisedetectionQuShaochengAiNingXuHaiyangTianYao(DepartmentofInformationTechnology,HuaZhongNormalUniversity,Wuhan430079)Abstract:AnadaptivevolumecontrolAT89S52MCUsystembasedonnoisecollectionisintroduced.Bylookingforbroadcastingintermittentperiodusingthevoicejudgecircuit,complicatednoisesignalathallenvironmentissampledrealtime.ThroughA/Dconversionandcalculation,theaveragepowerofnoisesignalcanbemeasured.Accordingtotheaveragepowerofnoisesignal,anadaptivevolumecontrolsystematcomplicatednoiseenvironmentisdesigned.Thedesignofhardwareandsoftwareissimpleandcostperformanceisgood.Experimentalresultsshowthatthewholesystemcanadaptiveadjustsvolumeaccordingtotheenvironmentnoisesignal,anditsengineeringvalueisgood.Keywords:voicedetection;noisesampling;adaptivevolumecontrol;AT89S52*:(20070511017)0,,,,[1],,;,800Hz,,MIC,,AT89S52,,A/D;,11AT89S52[23]MIC,,A/DAT89S52,,CPUA/D,,,MIC,2CPU100,,,,94瞿少成等:基于噪音检测的自适应音量控制系统的研制42[4]2.13MIC,NE553212V,R13,-6~+6VD11R17,0~+6V,C14R17C14RC0.1s,,0~+6VADC08090~+5VA/D,32.24,CPU,NE5532,D21R24C23,LM393,R25LM393+!-!,LM393;,,,LM393;,LM393,CPU42.3A/DCPUA/DCPU5A/D5A/DCPU9532电子测量技术ADC0809[56];74LS02ADC0809;AT89S52ALEADC0809;,ADC08093,0;AT89S52P0LM393AT89S52P3.2,CPUA/DAT89S52P1.5P1.6,,3C,,,,,,66,,,P3.2A/D100100[7],P1.5P1.6,,,,;,,1[8]10,10s10s10s;10s10s,,,,14,,MIC;CD,;7DT815,0.5m,3m,,;,,,,5R31R322,20.3s,0.4s,;,7260dB60dB~70dB70dB~80dB80dBR31+R32R31R32070dB80dB90dB95dB5,,(下转第107页)96丁峰等:直接序列扩频系统解扩模块FPGA实现46BPSKPN,,32kbps,30MHz,PN128,4.096Mchips/s,3FPGA,FPGA,,,[1],.[M].:,1990.[2].[M].:,1993.[3]AJ,CDMA[M]..:,1997.[4].[J].,2003,24(9):117121.[5],,.L[J].,2008,31(2):7283.[6].[J].,2008,27(1):1215.[7],,.[M].:,2006:1923.[8],,.[J].,2008,31(4):3335.,,198210,,Email:[e-mail](上接第96页),,[1],,,.[J].,2007(11):7172.[2].AT89S52[J].,2007,26(11):95116.[3],,.AT89C51[J].,2008,31(9):41241.[4],[J].,2008,27(8):96147.[5].AT89S51ADC0809[J].,2005,19(5):6972.[6],,.89C51[J].,2004,25(4),:161461.[7],.[J].,2006,27(1):114116.[8],.[J].,2008,29(7):15071510.,1971,,,Email:[e-mail].,1975,,(上接第99页)[8],,,.[J].,2008,10:4445.,,1980,,Email:[e-mail],,1987,,2007107