数位显示 Digital display: 5 digits LCD. 测量范围 Measuring level: 30~130 dBA, 30~130 dBC. 分辨率 Resolution:0.1dB. 精确度 Accuracy: ±1.5 dB (under reference conditions) . 频率响应 Frequency range: 31.5 Hz~ 8.5K Hz . 动态范围 Linearity range: 50 dB . 频率加权特性 Frequency weighting: A, C . 模似条图 Bar graph: 50 dB scale at 1 dB step for monitoring current sound pressure level display . 测量量程 Level ranges:30-80 dB; 50-100 dB; 60-110 dB; 80-130 dB. 动态特征 Time weighting: Fast / Slow . 麦克风 Microphone: 1/2 inch Electret Condenser microphone . 最大值锁定 Max: Maximum hold . 电源 Power supply: 1*9V alkaline cells or DC 9V adapter < Power life: About 30 hrs >. 开机自检时间 Self calibration time: 10 sec (every turn on) . 机身尺寸 Dimensions: 220×67×32mm . 重量 Weight: 约approx. 210g(含电池including battery). |