SAE AMS4248 Aluminum Alloy Hand Forgings and Rolled Rings, 1.0Mg - 0.60Si - 0.28Cu - 0.20Cr (6061-T652), Solution Heat T
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Product Code:SAE AMS4248
Title:Aluminum Alloy Hand Forgings and Rolled Rings, 1.0Mg - 0.60Si - 0.28Cu - 0.20Cr (6061-T652), Solution Heat Treated, Stress Relief Compressed, and Precipitation Heat Treated
Issuing Committee:Ams D Nonferrous Alloys Committee
Scope:This specification covers an aluminum alloy in the form of hand forgings and rolled rings.
- 上一篇：SAE AMS4340 Aluminum Alloy, Extrusions, 6.2Zn - 2.3Cu - 2.2Mg - 0.12Zr (7050-T76511), Solution Heat Treated, Stress Reli
- 下一篇：SAE AMS6444 Steel, Bars, Forgings, and Tubing, 1.45Cr (0.93 - 1.05C) (SAE 52100), Premium Aircraft-Quality, Consumable E
MIL-S-23190E (NOTICE 1), MILITARY SPECIFICATION: STRAPS, CLAMPS, AND MOUNTING HARDWARE, PLASTIC AND METAL FOR CABLE HARNESS TYING AND SUPPORT (25 AUG 1998) [S/S BY SAE-AS23190]., MIL-S-23190E, dated 30 December 1987, is inactive for new design and is no longer used except for replacement purposes. Future design should refer to SAE-AS23190.CAUTION: The supersession information is valid as of the date of this notice and may be superseded by subsequent revisions of the superseding document.(Application for copies of SAE ?Aerospace Standards should be addressed to SAE, 400 Commonwealth Drive, Warrendale, PA 15096.)【英文标准名称】:Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Engineeringmethodsforsmall,movablesourcesinreverberantfields-Methodsforspecialreverberationtestrooms
【原文标准名称】:声学.声压法测定噪声源的声功率级.混响声场中小声源和移动声源的工程测量方法.特殊混响试验间用方法
【标准号】:BSENISO3743-2-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-05-31
【实施或试行日期】:2010-05-31
【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】:
【英文主题词】:Absorption;Acousticmeasurement;Acoustictesting;Acoustictestingrooms;Acoustics;Closedtestrooms;Definitions;Determination;Directmethod;Environment;Externalnoise;Handling;Information;Insulations;Mathematicalcalculations;Measurement;Measuringincertainity;Measuringinstruments;Measuringtechniques;Methods;Microphones;Noise(environmental);Noisemeasurements;Noisesources;Portable;Powerlevels;Precision;Pressuremeasurement(fluids);Reverberationrooms;Reverberationtime;Sound;Soundabsorption;Soundlevel;Soundpressure;Soundradiation;Soundsources;Soundspectra;Springs(water);Testing
【摘要】:ThispartofISO3743specifiesarelativelysimpleengineeringmethodfordetermingthesoundpowerlevelsofsmall,movablenoisesources.Themeasurementsarecarriedoutwhenthesourceisinstalledinaspeciallydesignedroomhavingaspecifiedreverberationtimeoverthefrequencyrangeofiterest.TheA-weightedsoundpowerlevelofthesourceundertestisdeterminedfromasingleA-weightedsoundpressurelevelmeasurementateachmicrophoneposition,ratherthanfromasummationofoctave-bandlevels.Thisdirectmethodeliminatestheneedforareferencesoundsource,butrequirestheuseofaspecialreverberationtestroom.Thedirectmethodisbasedonthepremisethatthesoundpressurelevel,averagedinspaceandtimeinthetestroom,canbeusedtodeterminethesoundpowerlevelemittedbythesource.Thepropertiesofthespecialreverberationtestroomarechosensothattheroom'sinfluenceonthesoundpoweroutputoftheequipmentundertestissmall.Thenumberofmicrophonepositionsandsourcelocationsrequiredinthetestroomarespecified.GuidelinesforthedesignofspecialreverberationroomsaregiveninannexB.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:32P.;A4
【正文语种】:英语