The PCBA-DBM-ECO module is built specifically with the most common sound level measurement applications in mind.
This budget-friendly decibel sensor is extremely easy to integrate and gives you hand-held Class 2 meter like accuracy.
Summary of Features
- Our most cost-effective yet accurate sound level sensor module!
- Two decimal point reading precision
- Accuracy of ±1dB at 1 kHz, 94 dB SPL (checked during production)
- 400 kHz I2C Interface
- Supply voltage: 1.8V – 3.3V
- 5V tolerant I2C bus – no level converter needed
- Frequency and time-weighting math as per IEC 61672-1
- Min/Max tracking and level interrupt pin
- Active Mode: 2.2 mA @ 3.3V
Sleep Mode: 10 μA @ 3.3V - ⚠️ Only A-weighting is supported
- ⚠️ The module uses a female 5-pin JST-XH 2.5mm pitch connector
Register Map and Datasheet (PDF)
- PCBA-DBM-ECO Module Datasheet PDF | Updated: March 29, 2026
The above datasheet includes detailed description of I2C registers and functions.
Recommended Applications
- Cost-sensitive but accurate environment monitors
- Indoor sound level metering (home, restaurants, AirBnB, etc)
- Outdoor sound level measurement (use our IP67 protective vent!)
- Battery based IoT sensor nodes
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