发布时间:2024-05-27 17:49:26 - 更新时间:2024年06月29日 15:22
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Methods of measurement for noise figure for low noise travelling wave tubes
Low noise travelling wave tubes,Type B-1
Low noise travelling wave tubes,Type B-101
Measurement conditions for low noise travelling wave tubes
Verification Regulation of Waveguide Noise Generator
Microwave circuits—Measuring methoels for noise source
General specification for low noise travelling wave tubes
本标准规定了旋转电机在单台空载稳态运行时A计权声功率的噪声限值。 本标准适用于符合GB 755要求并没有采取任何专门降低噪声措施的各种类型的电机。 本标准的表1适用于转速不超过3750r/min、功率从1至5500kW的交直流电机。 本标准的表2和表3分别适用于小功率
Measurement of airborne noise emitted by rotating electrical machinery and the noise limits--Noise limits
Specification for verification of wave guided noise generators
Zpracovatel: ENVICONSULT Praha, I?O 13797921, Ing. Ladislav Louda, CSc. Pracovník Federálního ú?adu pro normalizaci a mě?ení: Ing. Jarmila Millerov
Acoustic. Determination of occupational noise exposure and estimation of noise-induced hearing impairment
Methods of measurement for power gain of low noise travelling wave tubes
Methods of measurement for dynamic ranges of low noise travelling wave tubes
Microwave circuits.Measuring methods for solid noise sources
本标准规定了低噪声内燃机电站(以下简称电站)的噪声指标、原则性的降噪措施和测量噪声的方法。至于电站的其他性能指标,应符合相应国家标准、国家军用标准和行业标准的规定。 本标准适用于由往复式内燃机(RIC)驱动的工频(50Hz/60Hz)、中频(400Hz)、双频(50Hz/400Hz)、直流、交直流
Noise indicated requirements and test methods for low-noise electric power plant with internal combustion engine
Methods of measurement for noise figure for low noise travelling wave tubes
Low noise travelling wave tubes,Type B-1
Low noise travelling wave tubes,Type B-101
Measurement conditions for low noise travelling wave tubes
Verification Regulation of Waveguide Noise Generator
Microwave circuits—Measuring methoels for noise source
General specification for low noise travelling wave tubes
本标准规定了旋转电机在单台空载稳态运行时A计权声功率的噪声限值。 本标准适用于符合GB 755要求并没有采取任何专门降低噪声措施的各种类型的电机。 本标准的表1适用于转速不超过3750r/min、功率从1至5500kW的交直流电机。 本标准的表2和表3分别适用于小功率
Measurement of airborne noise emitted by rotating electrical machinery and the noise limits--Noise limits
Specification for verification of wave guided noise generators
Zpracovatel: ENVICONSULT Praha, I?O 13797921, Ing. Ladislav Louda, CSc. Pracovník Federálního ú?adu pro normalizaci a mě?ení: Ing. Jarmila Millerov
Acoustic. Determination of occupational noise exposure and estimation of noise-induced hearing impairment
Methods of measurement for power gain of low noise travelling wave tubes
Methods of measurement for dynamic ranges of low noise travelling wave tubes
Microwave circuits.Measuring methods for solid noise sources
本标准规定了低噪声内燃机电站(以下简称电站)的噪声指标、原则性的降噪措施和测量噪声的方法。至于电站的其他性能指标,应符合相应国家标准、国家军用标准和行业标准的规定。 本标准适用于由往复式内燃机(RIC)驱动的工频(50Hz/60Hz)、中频(400Hz)、双频(50Hz/400Hz)、直流、交直流
Noise indicated requirements and test methods for low-noise electric power plant with internal combustion engine