Detecting sound isn’t as simple as a mic into an input. Signal conditioning and gain control are important, and are incorporated into this Grove Loudness sensor. Using an electret mic and two-stage high-pass filter using an LM2904 opamp, it creates a nice, detectable envelope signal for your Grove project. Output gain is also configurable via a built-in trim potentiometer.

Specifications:

• Grove-compatible interface (analog)
• Adjustable output gain
• 3.5 ~ 10VDC
• 50-20kHz mic frequency sensitivity
• -48 ~ 66 dB mic sensitivity
• >58db SNR ratio

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