动态特性选择  Microphone 1/2 Inch Electret Condenser Microphone   麦克风  1/2 英寸电容式麦克风   Frequency Weighting A & C A & C  频率加权特性  Sound Measuring Level Selection √ √  测量档位选择  Max Hold Function √ √  大值锁定  Sampling Frequency 2 times/sec 2 times/sec