DFRobot
Gravity: Analog Sound Level Meter
The Gravity Analog Sound Level Meter is an Arduino-compatible decibel meter that accurately measures environmental noise levels. It uses an instrumentation-g...
The Gravity Analog Sound Level Meter is an Arduino-compatible decibel meter that accurately measures environmental noise levels. It uses an instrumentation-grade circuit with a low-noise microphone for high-precision readings across a 30–130 dBA range.
The output voltage is linearly proportional to the decibel level (0.6V–2.6V maps to 30–130 dBA), so no complex algorithms are needed — just a simple linear conversion. The Gravity analog interface allows plug-and-play connection without soldering.
Key Features
- Measuring Range – 30 dBA to 130 dBA
- Measurement Error – ±1.5 dB
- Frequency Weighting – A-weighted
- Frequency Response – 31.5 Hz to 8.5 kHz
- Time Characteristics – 125 ms
- Input Voltage – 3.3V to 5.0V
- Input Current – 22 mA at 3.3V, 14 mA at 5.0V
- Output Voltage – 0.6V to 2.6V (linear mapping to dBA)
- Interface – Gravity analog (plug-and-play, no soldering)
- Dimensions – 60 × 43mm
Ideal For
- Environmental noise monitoring
- Highway and roadside noise measurement stations
- Bedroom and indoor noise level tracking
- Sound-reactive Arduino projects
Package Contents
- 1× Gravity Analog Sound Level Meter
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
Find this product in
Audio & Video
Brands
Sensors & Input
SEN0232 PCB Layout
Mechanical Drawings · 54.4 KB · Click any page to view full size
Supplier page — dfrobot.com
Supplier Description · 2.0 MB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
