“Acoustics--Free-fiel” 中國GB標準檢索結果

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	GB/T 21228.2-2023 声学表面声散射特性第2部分：自由场方向性扩散系数测量（中英文版） Acoustics - Surface sound scattering properties - Part 2: Free-field directional diffusion coefficient measurement
	GB/T 42553-2023 电声学确定声级计自由场响应修正值的方法（中英文版） Electroacoustics - Method for determining free-field response corrections for sound level meters
	GB/T 17248.2-2018 声学-机器和设备发射的噪声-在一个反射面上方可忽略环境修正的近似自由场测定工作位置和其他指定位置的发射声压级（中英文版） Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections
	GB/T 34828-2017 声学自由场环境评定测试方法（中英文版） Acoustics—Test methods for the qualification of free-field environments
	GB/T 3767-2016 声学声压法测定噪声源声功率级和声能量级反射面上方近似自由场的工程法（中英文版） Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane
	GB/T 32524.2-2016 声学声压法测定电力电容器单元的声功率级和指向特性第2部分：反射面上方近似自由场的工程法（中英文版） Acoustics—Determination of sound power level and directivity character of power capacitor using sound pressure—Part 2: Engineering methods for an essentially free field over a reflecting plane
	GB/T 20441.3-2010 电声学测量传声器第3部分：采用互易技术对实验室标准传声器的自由场校准的原级方法（中英文版） Electroacoustics - Measurement microphone - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
	GB/T 4854.7-2008 声学校准测听设备的基准零级第7部分: 自由场与扩散场测听的基准听阈（中英文版） Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
	GB/T 17248.2-1999 声学机器和设备发射的噪声工作位置和其他指定位置发射声压级的测量一个反射面上方近似自由场的工程法（中英文版） Acoustics--Noise emitted by machinery and equipment--Measurement of emission sound pressure levels at a work station and at otherspecified positions--Engineering method in an essentially free field over a reflecting plane
	GB/T 3767-1996 声学声压法测定噪声源声功率级反射面上方近似自由场的工程法（中英文版） Acoustics--Determination of sound power levels of noise sources using sound pressure--Engineering method in an essentially free field over a reflecting plane
	GB/T 3223-1994 声学水声换能器自由场校准方法（中英文版） Acoustics--Free-field calibration method of under-water sound transducers

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