Introduction and Compatibility

Main Features

➤ Accurate entry-level I2C sound sensor solution
➤ Designed for easy use in prototypes and mass produced applications
➤ Frequency weighting as prescribed in IEC-61672
➤ Runs on both 3.3V and 1.8V, perfect for use with any embedded system like Arduino, Raspberry Pi, ESP32, etc.
➤ Ability to set averaging time (30ms to 10,000 ms) for smooth readings
➤ History buffer that stores up to 100 readings even if host MCU is in sleep mode
➤ Interrupt to wake up a host MCU

Typical Applications

The PCBA-DBM-r3 is a basic general purpose I2C sound level sensor designed for use in sound sensing applications that require an accurate frequency-weighted readout.
This module can be integrated with any embedded system and supports standard I2C communication protocol. Typical applications include
➤ Noise level-activated products
➤ Indoor Noise Measurement (AirBnB, offices, schools, etc.)
➤ Outdoor Noise Measurement (airplane, traffic, etc.)

Connector Options

The PCBA-DBM-r3 module ships with two connector options:
➤ 0.1″ unsoldered headers (can be soldered on request)
➤ Vertical JST-XH-5 header (5-pin, 2.5mm pin pitch)

The 0.1″ header option makes this sensor convenient for prototyping on a breadboard or for making connections with dupont wires.

💡 TIP
Using the JST-XH connector option allows for easy mounting inside an enclosure with a sound inlet hole using our 3M die-cut tape. Refer to the mounting guide for more information.

Cross-Compatibility with Other Modules

All of our modules are designed with cross-compatibility in mind. Almost all our sound sensor solutions use the same 5-pin interface to maintain hardware compatibility across different modules.
Minimal firmware changes are needed for migrating between most of our sensors.