BS EN ISO 389-7-2006 声学.校准音响设备标准基准零点.在自由场所和非扩散场所听力条件下听力基准阈值
时间:2024-05-11 23:34:04 来源: 标准资料网 作者：标准资料网 阅读：8717
【英文标准名称】:Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Referencethresholdofhearingunderfree-fieldanddiffuse-fieldlisteningconditions
【原文标准名称】:声学.校准音响设备标准基准零点.在自由场所和非扩散场所听力条件下听力基准阈值
【标准号】:BSENISO389-7-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-01-23
【实施或试行日期】:2006-01-23
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:声学;听力测定;听觉阈;校正;条件;定义;扩散场;自由场;调查;试验报告;听度阈测量;参比状态;参考级;标准参考测量方法;声场;声压级
【英文主题词】:Acoustics;Audiometry;Auditorythreshold;Calibration;Conditions;Definition;Definitions;Diffusefields;Electricalengineering;Freefields;Investigations;Measurementsofthresholdofaudibility;Referenceconditions;Referencelevels;Referencemeasuringmethods;Requirements;Soundfields;Soundpressurelevel
【摘要】:ThispartofISO389specifiesareferencethresholdofhearingforthecalibrationofaudiometricequipmentusedunderthefollowingconditions.a)Thesoundfieldintheabsenceofthelistenerconsistsofeitherafreeprogressiveplanewave(freefield)oradiffusesoundfield,asspecifiedinISO8253-2.Inthecaseofafreefield,thesourceofsoundisdirectlyinfrontofthelistener(frontalincidence).b)Thesoundsignalsarepure(sinusoidal)tonesinthecaseoffree-fieldconditionsandone-thirdoctavebandsof(whiteorpink)noiseinthecaseofdiffuse-fieldconditions.c)Thesoundpressurelevelismeasuredintheabsenceofthelisteneratthepositionwherethecentreofthelistener'sheadwouldbe.d)Listeningisbinaural.NOTE1Correctionvaluesforthethresh'oldofhearingunderfree-fieldlisteningconditionsandselectedanglesofsoundincidence(45°and90°)deviatingfromfrontalincidencearegiveninISO8253-2forinformation.NOTE2OtherconditionsaregiveninBibliographicReference[1].Thedataaregiveninnumericalformforthepreferredfrequenciesintheone-third-octaveseriesfrom20Hzto16000HzinclusiveinaccordancewithISO266and,inaddition,forsomeintermediateaudiometricfrequenciesupto18000Hz.ItshouldbeemphasizedthatthethresholddatadifferfromtheaudiometriczerospecifiedinISO389-1,ISO389-2,ISO/TR389-5andISO389-8,sincethelatterrefertomonaurallisteningthroughearphoneswithsoundpressurelevelsreferredtospecifiedcouplersandearsimulators.DirectcomparisonbetweenthedatainthepartsofISO389mentionedaboveandinthispartofISO389isthereforenotappropriate.
【中国标准分类号】:M72
【国际标准分类号】:13_140
【页数】:20P.;A4
【正文语种】:英语
【英文标准名称】:Opticsandphotonics-Opticaltransferfunction-Principlesofmeasurementofmodulationtransferfunction(MTF)ofsampledimagingsystems
【原文标准名称】:光学和光子学.光学转移函数.取样成像系统的调制传递函数(MTF)的测量原理
【标准号】:ISO15529-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-08-01
【实施或试行日期】:2010-08-01
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC172
【标准类型】:()
【标准水平】:()
【中文主题词】:摄影机;定义(术语);点象;纤维光学;傅里叶变换;图象质量;图像质量指示器;成象;测量;测量技术;调制信号;调制传递函数;光学测量;光学;光子学;图象传输;扫描器;扫描;传递函数;摄像机
【英文主题词】:Cameras;Definitions;Dotimages;Fibreoptics;Fourier-transformation;Imagequality;Imagequalityindicators;Imaging;Measurement;Measuringtechniques;Modulationsignals;Modulationtransferfunction;Opticalmeasurement;Optics;Photonics;Picturetransmissions;Scanners;Scanning;Transferfunctions;Videocameras
【摘要】:ThisInternationalStandardspecifiestheprincipalMTFsassociatedwithasampledimagingsystem,togetherwithrelatedterms,andoutlinesanumberofsuitabletechniquesformeasuringtheseMTFs.Italsodefinesameasureforthe“aliasing”relatedtoimagingwithsuchsystems.ThisInternationalStandardisparticularlyrelevanttoelectronicimagingdevicessuchasdigitalstillandvideocamerasandthedetectorarraystheyembody.AlthoughanumberofMTFmeasurementtechniquesaredescribed,theintentionisnottoexcludeothertechniques,providedtheymeasurethecorrectparameterandsatisfythegeneraldefinitionsandguidelinesforMTFmeasurementassetoutinISO9334andISO9335.Theuseofameasurementoftheedgespreadfunction,ratherthanthelinespreadfunction(LSF),isnotedinparticularasanalternativestartingpointfordeterminingtheOTF/MTFofanimagingsystem.
【中国标准分类号】:
【国际标准分类号】:17_180_01
【页数】:32P.;A4
【正文语种】:英语
【英文标准名称】:HealthInformatics.Harmonizeddatatypesforinformationinterchange
【原文标准名称】:健康信息学.信息交换用调制数据类型
【标准号】:BSENISO21090-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-03-31
【实施或试行日期】:2011-03-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:使用;计算机科学;数据;数据交换;数据格式;数据处理;数据类型;定义(术语);EDI;电子数据交换(EDI);可扩展标记语言;信息交换;信息处理;信息技术;医疗信息学;医学科学;息交换;文电;开放系统互连;开放系统互连(OSI);公共卫生;语义学;UML;统一建模语言;应用;可扩展标示语言(XML)
【英文主题词】:Applications;Computersciences;Data;Dataexchange;Dataformats;Dataprocessing;Datatypes;Definitions;EDI;ElectronicDataInterchange;ExtensibleMarkupLanguage;Informationinterchange;Informationprocessing;Informationtechnology;Medicalinformatics;Medicalsciences;Messageinterchanges;Messages;Opensystemsinterconnection;OSI;Publichealth;Semantics;UML;UnifiedModelingLanguage;Use;XML
【摘要】:
【中国标准分类号】:C07
【国际标准分类号】:35_240_80
【页数】:206P;A4
【正文语种】:英语