描述
Grove – Loudness Sensor 噪音感測器 環境聲音檢測模組 模擬輸出
Grove – Loudness Sensor 噪音感測器設計用於檢測環境聲音的響度。基於放大器 LM2904和內置麥克風，它放大並過濾從麥克風接收到的高頻信號，並輸出一個正信號。這將使 Arduino 的信號採集。輸出值取決於聲音輸入的水平。為了避免不必要的信號干擾，輸入信號將在模組內部經過兩次濾波。最後，有一個螺絲電位器，可以手動調整輸出增益。
特徵
- Grove 兼容的界面
- 寬電源電壓範圍
- 內置信號過濾
- 增益可通過螺絲電位器調節
產品規格
- 電壓：3.5〜10 VDC
- 工作頻率：50〜2000 Hz
- 靈敏度：-48〜66分貝
- 信噪比：> 58 dB
- 輸出信號範圍：模擬信號（0-1023）
Resources 技術文件
- 原廠技術文件與下載
- 【Eagle】 Grove – Loudness Sensor in Eagle format
- 【PDF】 Grove – loudness sensor Schematic in PDF format
- 【PDF】 Grove – loudness sensor PCB in PDF format
- 【Datasheet】 LM2904DR Datasheet
The Grove – Loudness Sensor is designed to detect the loudness of environmental sound. Based on amplifier LM2904 and a built-in microphone, it amplifies and filters the high frequency signal that received from the microphone, and outputs a positive envelop. This will make for Arduino’s signal acquisition. The output value depends on the level of sound input. In order to avoid unnecessary signal disturbances, input signal will go through two times filtering inside the module. Lastly, there is a screw potentiometer that enables manual adjustments to the output gain. Features
- Grove compatible interface
- Wide supply voltage range
- Built-in signal filtering
- Gain adjustable via screw potentiometer
Technical Details
| Dimensions | 24mm x 20mm x 9.8mm |
| Weight | G.W 7g |
| Battery | Exclude |
| Voltage | 3.5~10 VDC |
| Working Frequency | 50~2000 Hz |
| Sensitivity | -48~66 dB |
| Signal-to-noise Ratio | >58 dB |
| Output Signal range | Analog Signal (0-1023) |
Part List
| Grove – Loudness Sensor | 1 |
