DIN EN ISO 3747-2009 声学.声压法测定声源的声功率级.现场比较法(ISO3747:2000),ENISO3747:2009的德文版本

作者:标准资料网 时间:2024-05-04 00:25:19   浏览:8393   来源:标准资料网
下载地址: 点击此处下载
【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Comparisonmethodinsitu(ISO3747:2000);EnglishversionofDINENISO3747:2009-11
【原文标准名称】:声学.声压法测定声源的声功率级.现场比较法(ISO3747:2000),ENISO3747:2009的德文版本
【标准号】:DINENISO3747-2009
【标准状态】:作废
【国别】:德国
【发布日期】:2009-11
【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】:
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Comparison;Comparisonmethods;Definitions;Determination;Insitu;Inspection;Machinenoise;Machines;Measuringaccuracy;Measuringincertainity;Methods;Noise;Noise(environmental);Noiselevels;Noisemeasurements;Noisesources;Operatingconditions;Precision;Safety;Safetyofmachinery;Sonictesting;Soundlevel;Soundlevels;Soundpressure;Soundsources;Specification(approval);Testing;Use
【摘要】:1.1ThisInternationalStandardspecifiesamethodfordeterminingthesoundpowerlevelsofsoundsourcesinsitu,especiallyifnon-movable.Acomparisonmethodisusedandallmeasurementsarecarriedoutinoctavebands.Themeasurementuncertaintydependsonthetestenvironment.Themeasurementuncertaintyisevaluatedbycomparingwithanindicatordescribingthespatialsounddistribution.Theaccuracywilleitherbethatofanengineeringmethodorasurveymethod.Thesoundpowerlevelofthesourceundertestiscalculatedfromthemeasuredvaluesofthesoundpressurelevelsproducedatspecifiedmeasurementpointsbythesourceandbyareferencesoundsource,respectively.Thesoundpowerleveliscalculatedusingthecalibratedvaluesofthereferencesoundsourceandthedifferencesbetweenthevaluesobtainedwiththesourceundertestandthoseofthereferencesoundsource.Allcalculationsarecarriedoutinoctavebands,fromwhichtheA-weightedsoundpowerlevelisdetermined.NOTEFornoisesourceswhichcanbemoved,otherrelevantstandardsintheISO3740seriesmaybeused.1.2ThisInternationalStandardisapplicabletoallkindsoftestenvironmentswhicharetobefoundoutsidealaboratoryenvironment,providedthatthebackgroundnoiselevelissufficientlylowandthesoundpressurelevelatthemicrophonepositionsdependsmainlyonreflectionsfromtheroomsurfaces.NOTEISO3744orISO9614mayprovidealternativemethods.1.3ThisInternationalStandardisprimarilyapplicabletosourceswhichradiatebroad-bandnoise.Itmay,however,alsobeusedforsourceswhichradiatenarrow-bandnoiseordiscretetones,althoughthemeasurementuncertaintymightthenbecomelargerthanstatedherein.NOTEFornoisesourcesemittingstationarynoise,ISO9614maybeusedasanalternative.
【中国标准分类号】:
【国际标准分类号】:17_140_20
【页数】:28P.;A4
【正文语种】:英语


下载地址: 点击此处下载
Product Code:SAE J2280
Title:Ship Systems and Equipment--Fasteners--Selection and Identification Requirements
Issuing Committee:Ship Systems - Fasteners Committee
Scope: This SAE Standard provides a comprehensive list of requirements for the selection, identification, and control of metric and inch sized fasteners for use in shipboard applications for both shipbuilder installed joints and for use in shipboard components. The fastener selection requirements included the following: a. materials; b. thread selection; c. plating, coatings, surface treatments; d. locking devices and elements; e. screw thread fastener inserts; f. fastener part or identifying numbers; and g. identification markings.The purpose of this document is to assist the designer in selecting a fastener and in determining what fastener options should be specified for a particular application. This document is intended to provide uniform requirements for the shipboard use of threaded fasteners and their associated hardware. It is also intended to promote the use of standardized fasteners and to minimize the variety of fasteners used.
Rationale: This SAE Standard provides a comprehensive list of requirements for the selection, identification, and control of metric and inch sized fasteners for use in shipboard applications for both shipbuilder installed joints and for use in shipboard components. The fastener selection requirements included the following: a. materials; b. thread selection; c. plating, coatings, surface treatments; d. locking devices and elements; e. screw thread fastener inserts; f. fastener part or identifying numbers; and g. identification markings.The purpose of this document is to assist the designer in selecting a fastener and in determining what fastener options should be specified for a particular application. This document is intended to provide uniform requirements for the shipboard use of threaded fasteners and their associated hardware. It is also intended to promote the use of standardized fasteners and to minimize the variety of fasteners used.Product Code:SAE AMS7712
Title:Sheet and Strip, Flat-Rolled, Electrical, Non-Oriented, 3.0(Si+Al), Type 47s178 Or Type 64s194, Semi-Processed (Cancelled Sep 2000)
Issuing Committee:Ams E Carbon And Low Alloy Steels Committee
Scope:This specification covers two types of semi-processed silicon steel in the form of sheet and strip supplied in coils or cut lengths.