DFRobot Gravity Analog Sound Level Meter - A-Weighted 30-130dBA, 3.3-5V Input, Plug & Play
The DFRobot Gravity Analog Sound Level Meter is an Arduino-compatible decibel measurement module featuring a low-noise microphone and precision instrument-grade circuitry. It provides a linear analog voltage output (0.6-2.6V) corresponding to a 30-130dBA range with A-weighting, making it ideal for environmental noise monitoring projects with 3.3V or 5V microcontrollers.
Features
- A-weighted frequency response (31.5Hz – 8.5kHz) for accurate environmental noise measurement.
- Linear analog output (0.6V – 2.6V) directly maps to 30dBA – 130dBA, simplifying code integration.
- Wide operating voltage range (3.3V – 5.0V) compatible with Arduino, Raspberry Pi, and ESP32 platforms.
- High-precision instrument circuit and low-noise electret microphone ensure ±1.5dB measurement accuracy.
- Plug-and-play Gravity 3-pin connector eliminates soldering for rapid prototyping.
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The Gravity Analog Sound Level Meter employs a high-sensitivity electret condenser microphone paired with a precision instrumentation amplifier circuit. This design ensures stable, low-noise signal conditioning across the full audio frequency spectrum relevant for environmental sound pressure level (SPL) monitoring. The module outputs a DC voltage linearly proportional to the measured sound pressure level, adhering to the standard A-weighting curve which approximates human hearing sensitivity.
Engineered for seamless integration, the module requires only power (3.3V-5V), ground, and an analog input pin on your host controller. Its linear transfer function eliminates the need for complex logarithmic calculations in software, allowing for straightforward calibration and real-time dB level readout. The compact form factor and mounting holes facilitate installation in fixed monitoring stations or portable noise assessment devices.
Additional Information
| Weight | 0.023 kg |
|---|---|
| Dimensions | 8 × 6.5 × 2.5 cm |
