FarFieldMeasurementCondition自由场测试条件Temperature温度:25&plu***n;3℃BiasVoltage基准电压:2.0V(with2.2㏀seriesresistor2.2㏀电阻)Acousticstimulus:1Pa(94㏈SPLat1㎑)at50㎝fromtheloud-speaker.声音条件Theloud-speakermustbecalibratedtomakeaflatfrequencyresp***einputsignal距离扬声器50cm处产生1pa声压。扬声器必须先用标准输入信号事先校准。Position:Thefrequencyresp***eofmicrophoneunitmeasuredat50㎝fromtheloud-speaker位置：扬声器距离待测话筒50cm.)