Grove – Loudness Sensor 噪音,環境聲音檢測 感測器 seeed
Grove – Loudness Sensor 噪音感測器 環境聲音檢測傳感器
Grove – Loudness Sensor旨在檢測環境的聲音。它基於LM2904放大器和內置的麥克風,它可以從麥克風中接收到高頻信號並且進行放大和濾波,並輸出正包絡。這可以用Arduino進行信號採集。而且它輸出值取決於聲音輸入的電平高低。輸入信號會經過模塊的兩次濾波來避免不必要的信號干擾。而且這裡有一個螺旋電位計可以通過手動調整輸出增益。
特徵
- Grove兼容接口
- 供電電壓範圍寬
- 內置信號濾波
- 通過螺絲電位計增益可調
規格
- 工作電壓:3.5~10 VDC
- 工作頻率:50~2000 Hz
- 檢測方位 : -48~66 dB
- 信噪比 : >58 dB
- 輸出信號 : 模擬信號(0-1023)
應用示例
這個示例中,我們在Serial Monitor裡查看傳感器讀取的音強信號。將傳感器連接至模擬口A0。
int val; void setup() { Serial.begin(9600); } void loop() { analogRead(0); delay(10); val = analogRead(0); Serial.println(val); delay(200); }
下圖中,藍色的線條是原始的信號,黃色線條是芯片放大處理的信號。
對著傳感器吹起:
對著傳感器說話:
出貨清單
- Grove – Loudness Sensor x1
- Grove連接線 x1
Documents
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Grove – Loudness Sensor
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