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  • ISO 20906-2009 - 中外标准 - - 2009/12 - 现行
    ISO 20906:2009 specifies: a) the typical application for a permanently installed sound-monitoring system around an airport; b) performance specifications for instruments, and requirements for their unattended installation and operation, so as to determine continuously monitored sound pressure levels of aircraft sound at selected locations; c) requirements for monitoring the sound of aircraft operations from an airport; d) requirements for the quantities to be determined to describe the sound of aircraft operations; e) requirements for data to be reported and frequency of publication of reports; f) a procedure for determining the expanded uncertainty of the reported data in accordance with ISO/IEC Guide 98-3. ISO 20906:2009 does not provide: 1) a method for confirming or validating predicted sound contours; 2) a method for determining, validating or confirming aircraft noise certification data; 3) a method for describing the sound generated by aircraft while on the ground (including ground movements and the use of auxiliary power units), except while on the runway after start of roll for departures and between touchdown and leaving the runway for arrivals.
    声学测量声学航空设备航空航天运输航空运输空气噪声空气(载)声空气载声等级航空器飞机噪声航空港覆盖数据处理数据记录定义空气噪声测量测量仪器监视器噪声(环境的)操作说明书声级表监督(认可)Acoustic measurementAcousticsAeronautical equipmentAerospace transportAir transportAirborne noiseAirborne soundAirborne sound levelAircraftAircraftsAirplane noiseAirportsCoverageData processingData recordingDefinitionsMeasurement of airborne noiseMeasuring instrumentsMonitorsNoise (environmental)Operational instructionsSound metersSurveillance (approval)
  • ISO 7235-2003 - 中外标准 - - 2003/8 - 现行
    ISO 7235:2003 specifies methods for determining the insertion loss, in frequency bands, of ducted silencers with and without airflow, the sound power level, in frequency bands, of the flow noise (or regenerated sound) generated by ducted silencers, the total pressure loss of silencers with airflow, and the transmission loss, in frequency bands, of air-terminal units. The measurement procedures are intended for laboratory measurements at ambient temperature. Measurements on silencers in situ are specified in ISO 11820. It is to be noted that the results determined in a laboratory according to ISO 7235:2003 will not necessarily be the same as those obtained in situ (installation), as different sound and flow fields will yield different results. For example, the pressure loss will be lower under laboratory conditions than in situ, but will be comparable between different laboratories. ISO 7235:2003 is applicable to all types of silencer including silencers for ventilating and air-conditioning systems, air intake and exhaust of flue gases, and similar applications. Other passive air-handling devices, such as bends, air-terminal units or T-connectors, can also be tested using this International Standard. It is not applicable to reactive silencers used for motor vehicles.
    阻尼(波)实验室测量技术声学性能试验声强管道运河定义试验测量声压级测量仪器符号声学试验流动通风设备声级试验炉压力降声学测量噪声消声器衰减常数介入损耗测量设备通风道工程测量管道噪声测量发动机消音器AbsorptionAcoustic measurementAcoustic testingAcousticsAir ductsAir flowAttenuation constantCablesCalibrationCanalsChecking equipmentClassesCorrrectionsDampingDefinitionsDuctsEngine silencersEquipmentExternal noiseFansFlowGraphic symbolsHandlingInsertion lossLaboratoriesLaboratory testingLaboratory testsLoudspeakersMeasurementMeasurement circuitsMeasuring ductsMeasuring environmentMeasuring equipmentMeasuring instrumentsMeasuring objectsMeasuring techniquesMicrophone arrangementMicrophonesMineral woolNoiseNoise abatementNoise (environmental)Noise measurementsPerformance testsPrecisionPressure dropsReflectionReverberation roomsSilencersSonic testingSoundSound absorptionSound fieldsSound intensitySound levelSound levelsSound metersSound pressureSound pressure levelSound sourcesStructure-borne noiseSymbolsTest furnacesTest resultsTestingTesting set-upsTransmittancesVentilation ductworkVentilation equipmentWalls
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    GB/T 14375-1993 - 中外标准 - - 1993/5 - 作废
    本方法适用于地面水、航天工业废水中一甲基肼的测定。  一甲基肼的测定范围为0.02~0.80mg/L。水样中一甲基肼含量大于0.80mg/L时,可稀释后测定。  肼干扰一甲基肼的测定。偏二甲基肼含量高于一甲基肼时,可用校正曲线预以校正。
    二甲氨基苯甲醛分光光度法甲基化合物肼化合物水质试验甲基肼含量测定含量测定分光光度法水质试验甲基化合物肼化合物二甲氨基苯甲醛甲基肼
  • MH/T 5105-2007 - 中外标准 - - 2007/8 - 现行
    本标准规定了民用机场周围飞机噪声计算和预测方法。本标准适用于民用机场周围飞机噪声的计算和预测。
    民用机场飞机噪声计算预测AERODROMESAIRCRAFTAIRCRAFTSNOISENOISE (SOUND)NOISE(SOUND)NOISE CONTROLNOISE CONTROL (ACOUSTIC)MEASUREMENTMEASURINGMEASUREMENTSCOMPUTATIONCALCULATIONSCALCULATIONFORECASTINGPREDICTION
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    GB/T 17809-1999 - 中外标准 - - 1999/8 - 现行
    本标准规定了黏弹阻尼材料复模量的图形表示方法。该方法适用于宏观均质、线性和热流变性简单的黏弹阻尼材料。其复模量可以是切变模量、杨氏模量、体积模量,也可以是纵向波传播模量或拉梅模量。本图示法适用于大多数黏弹阻尼材料,而且具有足够的精度。  本标准同时给出了推荐术语,包括:参数、符号和定义。  本标准的主要目的是为了改善涉及黏弹阻尼材料的各种技术领域间的交流。
    图示法模量复模量阻尼材料材料modulusmaterialssubstance
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    GB/T 15507-1995 - 中外标准 - - 1995/1 - 作废
    本标准适用于地面水和工业废水中肼的测定。  试料体积1~10mL,比色皿光程为1.5cm时,本方法检测限以肼计为0.002mg/L,测定上限为1.00mg/L。更高浓度的样品,稀释后再进行测定。  干扰:氨基脲、硫脲、脲素分别高达20、50、200mg/L以上时干扰测定;一甲基肼为肼含量的3倍以上,NO^-(2)大于1mg/L时产生干扰。
    含量测定分光光度法二甲氨基苯甲醛水质试验水质测定对二甲氨基苯甲醛分光光度法
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    GB/T 14377-1993 - 中外标准 - - 1993/5 - 现行
    本方法适用于地面水、航天工业废水中三乙胺的测定。  三乙胺的测定范围:0.5~3.5mg/L。水样中三乙胺含量大于3.5mg/L时,可稀释后按本方法测定。
    乙基化合物分光光度法溴酚蓝水质试验含量测定含量测定分光光度法水质试验乙基化合物溴酚蓝
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    GB/T 14378-1993 - 中外标准 - - 1993/5 - 现行
    本方法适用于地面水、航天工业废水中二乙烯三胺的测定。  二乙烯三胺的测定范围:0.4~3.2mg/L。水样中二乙烯三胺含量大于3.2mg/L时,可稀释后按本方法测定。  水中存在偏二甲基肼、硝基甲烷、NH^+(4)等干扰物,其浓度为二乙烯三胺浓度5倍以内时,干扰很小,可不计;水中存在二甲苯胺、三乙胺、NO^-(3)、NO^-(2)等干扰物,其浓度为二乙烯三胺浓度10倍以内时,干扰很小,可不计;甲醛含量高于0.8mg/L时,会产生负干扰。
    含量测定二乙烯三胺水杨醛水质试验分光光度法含量测定分光光度法水质试验二乙烯三胺水杨醛
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    GB/T 14376-1993 - 中外标准 - - 1993/5 - 现行
    本方法适用于地面水、航天工业废水中偏二甲基肼的测定。  偏二甲基肼的测定范围:0.01~1.0mg/L。水样中偏二甲基肼含量大于1.0mg/L时,可稀释后按本方法测定。  氨、尿素对本方法测定基本无干扰。肼、一甲基肼、甲醛含量在偏二甲基肼含量5倍以上干扰测定。
    含量测定氨基亚铁氰化钠水质试验肼化合物甲基化合物分光光度法氰化物钠无机化合物含量测定分光光度法钠无机化合物水质试验甲基化合物肼化合物氰化物氨基亚铁氰化钠
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    GB 9660-1988 - 中外标准 - - 1988/8 - 现行
    本标准规定了机场周围飞机噪声的环境标准。  本标准适用于机场周围受飞机通过所产生噪声影响的区域。
    噪声航空港飞行器噪声飞行器航空港
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