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GB/T 21228.2-2023 Acoustics - Surface sound scattering properties - Part 2: Free-field directional diffusion coefficient measurement 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 |
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GB/T 42553-2023 Electroacoustics - Method for determining free-field response corrections for sound level meters 电声学 确定声级计自由场响应修正值的方法 - 中英文版 |
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GB/T 17248.2-2018 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 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 |
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GB/T 34828-2017 Acoustics—Test methods for the qualification of free-field environments 声学 自由场环境评定测试方法 - 中英文版 |
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GB/T 3767-2016 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 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 |
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GB/T 32524.2-2016 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 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 |
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GB/T 20441.3-2010 Electroacoustics - Measurement microphone - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique 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 |
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GB/T 4854.7-2008 Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions 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 |
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GB/T 17248.2-1999 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 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 |
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GB/T 3767-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Engineering method in an essentially free field over a reflecting plane 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 |
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GB/T 3223-1994 Acoustics--Free-field calibration method of under-water sound transducers 声学 水声换能器自由场校准方法 - 中英文版 |
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