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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本标准规定了测定电弧焊机噪声声源A[计权]声功率级的方法。 本标准适用于电弧焊机及其配套设备(以下统称声源)所辐射的宽带、窄带、离散频率等稳态噪声。除重复率小于每秒5个的猝发声外,也适用于非稳态噪声源。对被测声源的体积不加限制,对于特大尺寸的声源,一般应选取主要噪声源的一部分进行测量
Determination for noise emitted by arc welding machines
本标准适用于测定声源A[计权]声功率级的简易法,即在规定的测点上测量声源的A[计权]声级,然后经过计算得出A[计权]声功率级。本方法尤其适用于现场测量,不必非将被测声源移入特殊声学环境内。 本标准是所有各类通用的电弧焊机所辐射的宽带、窄带、离散频率等稳态噪声。除重复率小于每秒5个的猝发声外,也
Methods of measurement on noise emitted by arc welding machine
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
1 Scopul prezentului standard este de a stabili nivelele admisibile de zgomot, exprimate ?n dB (A), pentru ma?inile electrice rotative de uz general c
ROTATING ELECTRICAL MACHINES Noise limits
Rotating Electrical Machines Noise Limits
Rotating electrical machines. Noise limits
This international Standard specifies the instrumentation and procedures for obtaining reproducible and comparable measurements of the noise inside
Acoustics. Measurement of noise inside aircraft
Interference which is sufficiently severe to cause unwanted operation of relays, etc., may be overcome by the use of loop circuits which should also
CAUSES OF NOISE AND WAYS OF REDUCING NOISE IN TELEPHONE EXCHANGES
Circuit noise may be classified as follows: power supply noise,noise generated in the speech path circuit,noise induced in the speech path circuit
CAUSES OF NOISE AND WAYS OF REDUCING NOISE IN TELEPHONE EXCHANGES
Circuit noise may be classified as follows: power supply noise,noise generated in the speech path circuit,noise induced in the speech path circuit
CAUSES OF NOISE AND WAYS OF REDUCING NOISE IN TELEPHONE EXCHANGES
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
本标准的目的是对用于飞机噪声评定的声测量和分析设备规定性能要求,该评定工作是按ISO 3891号标准所规定的程序,用于频谱分析作为时间函数进行的测量。这是为了保证由使用不同仪器设备的各个噪声评定部门所获得的结果互相可以比较
本部分规定了在标准条件下涉及测定、标示和检验旋转电机噪声发射特性所需的所有内容。同时还规定了适用的噪声测试方法和试验时的运行状态及安装方式。 噪声发射特性包括声功率级和发射声压级,这些量的测定用于: ——电机发射噪声的比较; ——使制造厂能确定噪声发射标示值
Measurement of airborne noise emitted by rotating electrical machines and the noise limits Part 1: Method for the measurement of airborne noise emitted by rotating electrical machines
This document specifies requirements for the electroacoustical performance of systems of instruments used to measure sound for the purposes
Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft
Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft
本标准规定了测定电弧焊机噪声声源A[计权]声功率级的方法。 本标准适用于电弧焊机及其配套设备(以下统称声源)所辐射的宽带、窄带、离散频率等稳态噪声。除重复率小于每秒5个的猝发声外,也适用于非稳态噪声源。对被测声源的体积不加限制,对于特大尺寸的声源,一般应选取主要噪声源的一部分进行测量
Determination for noise emitted by arc welding machines
本标准适用于测定声源A[计权]声功率级的简易法,即在规定的测点上测量声源的A[计权]声级,然后经过计算得出A[计权]声功率级。本方法尤其适用于现场测量,不必非将被测声源移入特殊声学环境内。 本标准是所有各类通用的电弧焊机所辐射的宽带、窄带、离散频率等稳态噪声。除重复率小于每秒5个的猝发声外,也
Methods of measurement on noise emitted by arc welding machine
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
1 Scopul prezentului standard este de a stabili nivelele admisibile de zgomot, exprimate ?n dB (A), pentru ma?inile electrice rotative de uz general c
ROTATING ELECTRICAL MACHINES Noise limits
Rotating Electrical Machines Noise Limits
Rotating electrical machines. Noise limits
This international Standard specifies the instrumentation and procedures for obtaining reproducible and comparable measurements of the noise inside
Acoustics. Measurement of noise inside aircraft
Interference which is sufficiently severe to cause unwanted operation of relays, etc., may be overcome by the use of loop circuits which should also
CAUSES OF NOISE AND WAYS OF REDUCING NOISE IN TELEPHONE EXCHANGES
Circuit noise may be classified as follows: power supply noise,noise generated in the speech path circuit,noise induced in the speech path circuit
CAUSES OF NOISE AND WAYS OF REDUCING NOISE IN TELEPHONE EXCHANGES
Circuit noise may be classified as follows: power supply noise,noise generated in the speech path circuit,noise induced in the speech path circuit
CAUSES OF NOISE AND WAYS OF REDUCING NOISE IN TELEPHONE EXCHANGES
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
本标准的目的是对用于飞机噪声评定的声测量和分析设备规定性能要求,该评定工作是按ISO 3891号标准所规定的程序,用于频谱分析作为时间函数进行的测量。这是为了保证由使用不同仪器设备的各个噪声评定部门所获得的结果互相可以比较
本部分规定了在标准条件下涉及测定、标示和检验旋转电机噪声发射特性所需的所有内容。同时还规定了适用的噪声测试方法和试验时的运行状态及安装方式。 噪声发射特性包括声功率级和发射声压级,这些量的测定用于: ——电机发射噪声的比较; ——使制造厂能确定噪声发射标示值
Measurement of airborne noise emitted by rotating electrical machines and the noise limits Part 1: Method for the measurement of airborne noise emitted by rotating electrical machines
This document specifies requirements for the electroacoustical performance of systems of instruments used to measure sound for the purposes
Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft
Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure sound pressure levels in noise certification of aircraft