香港希瑪AR824噪音計技術參數：
噪音計AR824
| | AR-814 | AR-824 | | Measuring Range | 30～130dBA | 30～130dBA | | 測量范圍 | 35～130dBC | 35～130dBC | | Accuracy | ±1.5dB | ±1.5dB | | 測量*度 | | Frequency Range | 31.5HZ-8.5KHZ | 31.5HZ-8.5KHZ | | 頻率響應 | | Linearity Range | 50dB | 50dB | | 動態范圍 | | AC/DC Output | √ | √ | | AC/DC信號輸出 | | Auto Power Shut Off | √ | √ | | 自動關機功能 | | Low Battery Indication | √ | √ | | 低電顯示功能 | | Over Range Indication | √ | √ | | 過載提示 | | Digit &Resolution | 5Digits &0.1dB | 5Digits &0.1dB | | 數位及分辨率 | | Time Weighting Selection | Fast/Slow | Fast/Slow | | 動態特性選擇 | | Microphone | 1/2Inch Electret Condenser Microphone | | 麥克風 | 1/2英寸電容式麥克風 |
| | Frequency Weighting | A&C | A&C | | 頻率加權特性 | | Sound Measuring Level Selection | √ | √ | | 測量檔位選擇 | | Max Hold Function | √ | √ | | *大值鎖定 | | Sampling Frequency | 2times/sec | 2times/sec |
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