This noise monitoring system tracks sound levels from Interstate 75 near Alpine Meadow using:
- Raspberry Pi Zero 2 W (512MB RAM)
- PCB Artists I2C Decibel Sound Level Meter
ARM Cortex M4 processor with pre-calibrated dB SPL output
Designed according to IEC 61672 Class 2 guidelines, but it is not formally certified
- DS3231N RTC Module
For accurate timestamping
- MQTT over WebSocket
For real-time data streaming
Data is measured continuously and published to a cloud MQTT broker, then displayed in real-time on this dashboard. The system operates 24/7 with offline capability and maintains accurate time through power losses.
All measurements are in A-weighted decibels (dBA), the standard for environmental noise monitoring.