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  • ISO 4869-1-1990 - 中外标准 - - 1990/12 - 作废
    Specifies a method for measuring sound attenuation at the threshold of hearing. The procedure is designed to yield values close to the maximum attenuation which are not normally attained under field conditions. The values reflect the attenuating characteristics only to the extent that users wear the device in the same manner as did the test subjects. Data are collected at low sound pressure levels but which are also representative of the values at higher sound pressure levels.
    声学隔音声学测量护耳器衰减Acoustic measurementAcousticsAttenuationAudiobilityAuditory thresholdClosed test roomsConvergenceDefinitionsEar muffsEar plugsEar protectorsEar-muff type wearing protectorsElectrical engineeringInsulationsListening testsLoss of hearingMeasurementMeasurement of threshold of audibilityMeasuring equipmentMeasuring resultsMethodsMethods for measuringNoiseNoise abatementNoise controlNoise measurementsSafety devicesSignalsSoundSound insulationSound pressureSound pressure levelTest personsTestingVibration engineering
  • ISO 718-1990 - 中外标准 - - 1990/11 - 现行
    Specifies a thermal shock test and the procedure for determining the thermal shock endurance. Does not apply to fused silica ware and annealed containers made from soda-lime-silicate glass.
    实验室设备玻璃器皿温度冲击试验实验室器皿实验室玻璃器皿玻璃热试验耐久试验耐热震强度试验DeterminationEndurance testingGlassGlasswareLaboratory equipmentLaboratory glasswareLaboratory wareTestingThermal shock enduranceThermal testingThermal-shock resistanceThermal-shock tests
  • ZB N61014-1990 - 中外标准 - - 1990/4 - 作废
  • IEC 61012-1990 - 中外标准 - - 1990/1 - 现行
    This standard specifies the electrical characteristics of a U-weighting filter mainly for use with sound level meters meeting the requirements of IEC 651 for the measurement of audible sound in the presence of ultrasound.
    测量仪器电气工程声学过滤机可听度测量滤声器超声波学声学设备频率声学测量Acoustic equipmentAcoustic filtersAcoustic measurementAcousticsApplicationsAudibilityElectrical engineeringElectroacousticsFiltersFrequenciesMeasurementMeasuring instrumentsRatingsSpecification (approval)Ultrasonics
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