您的位置: 标准下载 » 国际标准 » BS 英国标准 »

BS EN ISO 389-3-1999 声学.音响设备校正参考零点.纯音和骨振子用参考等效阈听力级

作者:标准资料网 时间:2024-05-12 22:42:24  浏览:8077   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:Acoustics-Referencezeroforthecalibrationofaudiometricequipment-Referenceequivalentthresholdforcelevelsforpuretonesandbonevibrators
【原文标准名称】:声学.音响设备校正参考零点.纯音和骨振子用参考等效阈听力级
【标准号】:BSENISO389-3-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1995-03-15
【实施或试行日期】:1995-03-15
【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】:声学测量;声学试验;声学;空气传导助听器;仿真乳突;听度;听力计;听力测定;听觉阈;骨导体;骨传导振动器;校正;基准面;定义;定义(术语);耳机;电气工程;听力试验;助听器;收听试验;测量;测量条件;听阈测量;听度阈测量;特性;纯普听力图;参考级;参照数量;声强;规范(验收);试验设备;测试条件
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Airconductionhearingaids;Artificialmastoids;Audiobility;Audiometers;Audiometry;Auditorythreshold;Boneconductors;Bonevibrator;Calibration;Datum;Definition;Definitions;Earphones;Electricalengineering;Hearingabilitytests;Hearingaids;Listeningtests;Measurement;Measurementconditions;Measurementofthresholdofaudibility;Measurementsofthresholdofaudibility;Properties;Pure-toneaudiometers;Referencelevels;Referencequantity;Soundintensity;Specification(approval);Testequipment;Testingconditions
【摘要】:ThispartofISO389specifiesthefollowingdataapplicabletothecalibrationofbonevibratorsforpuretonebone-conductionaudiometry.a)Referenceequivalentthresholdforcelevels(RETFLs),correspondingtothethresholdofhearingofyoungotologicallynormalpersonsbybone-conductionaudiometry.RETFListhevibratoryforceleveltransmittedtoamechanicalcouplerofspecifiedcharacteristics(see5.3)byavibratorwhenappliedtothemechanicalcouplerunderstatedconditionsoftestandwhenenergizedatthevoltagelevelcorrespondingtothenormalthresholdofhearingforlocationonthemastoidprominence.NOTE1InterimvaluesforthedifferencesinreferenceequivalentthresholdforcelevelsbetweenlocationontheforeheadandmastoidareincludedforinformationinAnnexC.b)Essentialcharacteristicofthebonevibratorandofitsmethodofcouplingtoapersonundertestandtothemechanicalcoupler.c)Essentialcharacteristicsanddatumlevelofthemaskingnoiseappliedtotheearnotundertest.GuidanceonthepracticalapplicationofthispartofISO389inthecalibrationofaudiometersisgiveninAnnexB.NOTE2Recommendedproceduresforcarryingoutbone-conductionaudiometryarespecifiedinISO8253-1.
【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


下载地址: 点击此处下载
【英文标准名称】:Carbonblackforrubberindustry--Fundamentalcharacteristics--Part6:Determinationofaggregatesizedistributionbydisccentrifugephotosedimentometry
【原文标准名称】:橡胶工业用炭黑.基本特性.第6部分:用盘式离心沉淀摄影法测定集料粒度分布
【标准号】:JISK6217-6-2008
【标准状态】:现行
【国别】:日本
【发布日期】:2008-11-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonChemicalProducts
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:G49
【国际标准分类号】:83_040_20
【页数】:18P;A4
【正文语种】:日语


MIL-D-7822, MILITARY SPECIFICATION: DRAWINGS. FOR STANDARD AIRCRAFT CHARACTERISTICS AND PERFORMANCE CHARTS, PILOTED AIRCRAFT (16 NOV 1951)., This specification covers the preparation of drawings for Standard Aircraft Characteristics Charts.