香港希玛AR824噪音计技术参数：
噪音计AR824
| | AR-814 | AR-824 | | Measuring Range | 30～130dBA | 30～130dBA | | 测量范围 | 35～130dBC | 35～130dBC | | Accuracy | ±1.5dB | ±1.5dB | | 测量精确度 | | Frequency Range | 31.5HZ-8.5KHZ | 31.5HZ-8.5KHZ | | 频率响应 | | Linearity Range | 50dB | 50dB | | 动态范围 | | AC/DC Output | √ | √ | | AC/DC信号输出 | | Auto Power Shut Off | √ | √ | | 自动关机功能 | | Low Battery Indication | √ | √ | | 低电显示功能 | | Over Range Indication | √ | √ | | 过载提示 | | Digit &Resolution | 5Digits &0.1dB | 5Digits &0.1dB | | 数位及分辨率 | | Time Weighting Selection | Fast/Slow | Fast/Slow | | 动态特性选择 | | Microphone | 1/2Inch 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 | √ | √ | | 最大值锁定 | | Sampling Frequency | 2times/sec | 2times/sec |
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