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【英文标准名称】:Acoustics-Measurementofairbornenoiseemittedbyinformationtechnologyandtelecommunicationsequipment
【原文标准名称】:声学信息技术和远程通讯设备发射的空气噪声的测量
【标准号】:ISO7779-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:声学;空气噪声;定义;试验;信息技术;电信;测定;声学试验;计算机;噪声(环境的);办公室设备
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoise;Airbornenoiseemitted;Airbornesound;Cables;Calibration;Clayfraction;Comparison;Computers;Corrrections;Data;Dataprocessing;Dataprocessingequipment;Definitions;Determination;Envelopingsurfacemethods;Environment;Externalnoise;Filters;Freefields;Frequencies;Handling;Informationtechnology;Inputvoltage;Installations;Instruments;Layout;Loudnesslevels;Machinenoise;Machines;Measurement;Measurementduration;Measuringbanks;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringrooms;Measuringsurfaces;Measuringsystems;Methods;Microphones;Moisture;Noise;Noisecontrol;Noiseemissions;Noise(environmental);Noisemeasurements;Officeequipment;Officemachines;Operatingconditions;Operatingstations;Operation;Operators;PC;Personalcomputers;Precision;Pressure;Printers;Reflection;Reverberationroommethod;Reverberationrooms;Rotation;Sitting;Soundintensity;Soundlevel;Soundpressure;Soundpressurelevel;Soundsources;Tables;Telecommunications;Temperature;Terminals;Testing;Typeofunit;Workingplaces
【摘要】:ThisInternationalStandardspecifiesproceduresformeasuringandreportingthenoiseemissionofinformationtechnologyandtelecommunicationsequipment.Thisstandardisconsideredpartofanoisetestcodeforthistypeofequipment,andisbasedonbasicnoiseemissionstandardsISO3741,ISO3744,ISO3745andISO11201.ThebasicemissionquantityistheA-weightedsoundpowerlevelwhichmaybeusedforcomparingequipmentofthesametypebutfromdifferentmanufacturers,orforcomparingdifferentequipment.ThreebasicnoiseemissionstandardsfordeterminingthesoundpowerlevelsarespecifiedinthisInternationalStandardinordertoavoidunduerestrictiononexistingfacilitiesandexperience.Thefirstbasicstandard(ISO3741)specifiescomparisonmeasurementsinareverberationroom;theothertwo(ISO3744andISO3745)specifymeasurementsinanessentiallyfreefieldoverareflectingplane.AnyoneofthesethreebasicnoiseemissionstandardsmaybeselectedandshallthenbeusedexclusivelyaccordingtothisInternationalStandardwhendeterminingsoundpowerlevelsofamachine.TheA-weightedsoundpowerlevelissupplementedbytheA-weightedsoundpressurelevelmeasuredattheoperatorposition(s)orthebystanderpositions,basedonthebasicnoiseemissionstandardISO11201.Thissoundpressurelevelisnotaworker'simmissionratinglevel,butitmayassistinidentifyinganypotentialproblemsthatcouldcauseannoyance,activityinterference,orhearingdamagetooperatorsandbystanders.MethodsfordeterminingwhetherthenoiseemissionincludesprominentdiscretetonesorisimpulsiveincharacterarespecifiedinannexesDandErespectively.ThisInternationalStandardissuitablefortypetestsandprovidesmethodsformanufacturersandtestinglaboratoriestoobtaincomparableresults.ThemethodsspecifiedinthisInternationalStandardallowthedeterminationofnoiseemissionlevelsforaunittestedindividually.Theproceduresmaybeappliedtoequipmentwhichemitsbroad-bandnoise,narrow-bandnoiseandnoisewhichcontainsdiscrete-frequencycomponents,orimpulsivenoise.Thesoundpowerandsoundpressurelevelsobtainedmayservenoiseemissiondeclarationandcomparisonpurposes(seeISO9296).Theyarenottobeconsideredasinstallationnoiseimmissionlevels;howevertheymaybeusedforinstallationplanning(seeECMATR/27).Ifsoundpowerlevelsobtainedaredeterminedforanumberofunitsofthesameproductionseries,theycanbeusedtodetermineastatisticalvalueforthatproductionseries(ISO9296).
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;35_180;35_260
【页数】:61P;A4
【正文语种】:英语