Journal
SENSORS
Volume 22, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/s22051946
Keywords
noise sources; regression analysis; impulsive noise; vehicle interior noise; traffic noise; alpha-stable noise
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]
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This study analyzes the interior acoustic noise inside vehicles under different conditions and compares the measured power levels using two different noise models. The results demonstrate that noise levels are higher when traffic conditions are good and the interior noise exhibits significant impulsiveness. Furthermore, the study suggests that noise sources related to the vehicle itself and its movement are the most relevant factors in the composition of interior acoustic noise.
Recently, the issue of sound quality inside vehicles has attracted interest from both researchers and industry alike due to health concerns and also to increase the appeal of vehicles to consumers. This work extends the analysis of interior acoustic noise inside a vehicle under several conditions by comparing measured power levels and two different models for acoustic noise, namely the Gaussian and the alpha-stable distributions. Noise samples were collected in a scenario with real traffic patterns using a measurement setup composed of a Raspberry Pi Board and a microphone strategically positioned. The analysis of the acquired data shows that the observed noise levels are higher when traffic conditions are good. Additionally, the interior noise presented considerable impulsiveness, which tends to be more severe when traffic is slower. Finally, our results suggest that noise sources related to the vehicle itself and its movement are the most relevant ones in the composition of the interior acoustic noise.
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