free-field meaning in Chinese
自由字段
Examples
- Measurement microphones - part 3 : primary method for free - field calibration of laboratory standard microphones by the reciprocity technique iec 61094 - 3 : 1995 ; german version en 61094 - 3 : 1995
测量传声器.第3部分:用互易技术对实验室标准传声器进