Development of a Noise Monitoring System for Automotive Cabins Based on LabVIEW and a Teensy Microcontroller
Online First: 17/06/2026
Corressponding author's email:
vulq@hcmute.edu.vnDOI:
https://doi.org/10.54644/jte.2026.2110Keywords:
Noise, LabVIEW, Teensy, INMP4411, OBD-IIAbstract
This paper presents the development and experimental evaluation of an in-cabin automotive noise monitoring system designed to acquire and analyze acoustic data for assessing the noise characteristics of different vehicle models. The system integrates multi-point sound pressure measurement within the cabin of passenger vehicles and provides real-time visualization through a computer-based interface. INMP441 acoustic sensors are installed at designated seating positions, transmitting signals to a central processing unit built on the Teensy platform, where signal processing and SPL computation are performed. Additionally, the processor retrieves engine speed and vehicle speed information from the vehicle’s CAN network to serve as reference parameters. The measured data are displayed via a LabVIEW interface and stored in Excel format to facilitate comparative analysis. The system has been experimentally deployed on three vehicle models representing common market segments in Vietnam. Experimental results enable the assessment of cabin noise levels, comparison of acoustic characteristics among seating positions, and identification of noise variations under different operating conditions.
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