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DIN EN ISO 3741-2001 声学.声压法测定噪声源声功率级.混响室精密法(ISO3741:1999)

作者:标准资料网 时间:2024-05-09 04:50:56  浏览:8733   来源:标准资料网
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【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Precisionmethodsforreverberationrooms(ISO3741:1999);GermanversionENISO3741:1999
【原文标准名称】:声学.声压法测定噪声源声功率级.混响室精密法(ISO3741:1999)
【标准号】:DINENISO3741-2001
【标准状态】:作废
【国别】:德国
【发布日期】:2001-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:数学计算;定义;定义;规范(验收);声强;噪声测量;试验;噪声(环境的);声学;测量技术;机器;声学试验;测量;测量仪器;声级;发出的空气噪声;响度;测定;混响室;音量;混响室法;混响;声源;声学测量
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoiseemitted;Calibration;Clay;Concentration;Definitions;Determination;Earprotectors;Environment;Filters;Frequencies;Handling;Hearingabilitytests;Humidity;Indications;Information;Loudnesslevels;Loudspeakers;Machines;Mathematicalcalculations;Measurement;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringrooms;Measuringtechniques;Microphones;Noise;Noise(environmental);Noisemeasurements;Noisesources;Observation;Operatingconditions;Position;Powerlevels;Precision;Reverberation;Reverberationroommethod;Reverberationrooms;Rooms;Safetyofmachinery;Sound;Soundabsorption;Soundintensity;Soundlevel;Soundpower;Soundpressure;Soundsources;Specification(approval);Standarddeviation;Surfaces;Temperature;Testing;Tests;Volume(sound)
【摘要】:Thedocumentspecifiesadiectmethodandacomparisonmethodwithagradeaccuracyusingareverberationtestroomfordeterminingthesoundpowerlevelproducedbyasource.Itspecifiestestroomrequirements,sourcelocationandgeneralrulesforoperatingconditions,intrumentationandtechniquesformeasuringsoundpressurelevelsfromwhichthesoundpowerlevelofthesourceinoctaveorone-third-octave-bandsiscalculated.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:24P.;A4
【正文语种】:德语


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【英文标准名称】:StandardTestMethodforMoldingIndexofThermosettingMoldingPowder
【原文标准名称】:热固模塑料粉末的模塑指数的标准试验方法
【标准号】:ASTMD731-1995
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:塑料;粉末;试验;热固性聚合物
【英文主题词】:Plastics;Powder;Testing;Thermosettingpolymers
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:83_080_10
【页数】:3P;A4
【正文语种】:英语


Product Code:SAE J902
Title:Passenger Car Windshield Defrosting Systems
Issuing Committee:Interior Climate Control Committee
Scope:This SAE Recommended Practice provides a test procedure and performance guideline for evaluating passenger vehicle windshield defrosting systems. It is limited to results of tests that can be conducted on uniform test equipment in commercially available laboratory facilities.The current engineering practice prescribes that for laboratory evaluation of defroster systems, a known quantity of water shall be sprayed on the windshield to form an ice coating and then melted by the defroster under specific vehicle operating conditions. The procedure provides uniform and repeatable laboratory test results, even though under actual conditions such a coating would be removed by scraping before driving the vehicle. The performance obtained, therefore, does not directly relate to actual driving conditions, but serves as a laboratory performance indicator for comparing test results within or between systems.This document is intended as a guide toward standard practice but may be subject to frequent change to keep pace with experience and technical advances and this should be kept in mind when considering its use

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