Far Field Measurement Condition 自由场测试条件
Temperature 温度 : 25 &plu***n; 3 ℃
Bias Voltage 基准电压 : 2.0V ( with 2.2㏀ series resistor 2.2 ㏀电阻)
Acoustic stimulus : 1Pa ( 94㏈ SPL at 1㎑ ) at 50 ㎝ from the loud-speaker.
声音条件 The loud-speaker must be calibrated to make a flat frequency resp***e input signal
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 : The frequency resp***e of microphone unit measured at 50㎝ from the loud-speaker
位置： 扬声器距离待测话筒50cm.