品牌香港希玛型号AR824类型数字式噪音计测量范围30～130dBA测量精度&plu***n;1.5dB工作温度详见说明（℃）分辨率0.1dB尺寸详见说明（mm）重量详见说明（kg）***ARTSENSOR数字噪音计AR824GENERALFEATURES&SPECIFICATI***一般功能和规格AR-814AR-824MeasuringRange30～130dBA30～130dBA测量范围35～130dBC35～130dBCAccuracy&plu***n;1.5dB&plu***n;1.5dB测量***度FrequencyRange31.5HZ-8.5KHZ31.5HZ-8.5KHZ频率响应LinearityRange50dB50dB动态范围AC/DCOutput√√AC/DC信号输出AutoPowerShutOff√√自动关机功能LowBatteryIndication√√低电显示功能OverRangeIndication√√过载提示Digit&Resolution5Digits&0.1dB5Digits&0.1dB数位及分辨率TimeWeightingSelectionFast/SlowFast/Slow动态特性选择Microphone1/2InchElectretCondenserMicrophone麦克风1/2英寸电容式麦克风FrequencyWeightingA&CA&C频率加权特性SoundMeasuringLevelSelection√√测量档位选择MaxHoldFunction√√***大值锁定SamplingFrequency2times/sec2times/sec取样频率)