Análise De Desempenho De Métodos De Doa Sujeitos a Modelos De Ruído Impulsivo Com Misturas Gaussinas.

Figueredo, Mario; Pena, Danilo; Filho, Carlos Alberto de Lima Botelho; Dória, Matheus F. de S.; Martins, Allan de Medeiros; Sousa, Vicente A. de

doi:10.35587/brj.ed.0000606

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“…Impulsive phenomena, in which the noise changes suddenly to a value far from the mean in a short period of time, can affect the performance of signal processing solutions based on traditional Gaussian modeling [62][63][64]. In the context of this work, impulsive noise is relevant to source location [64][65][66][67][68], voice processing [69,70], and noise comfort and pollution [71,72]. In several of the works cited above, impulsiveness is modeled by an alpha-stable distribution.…”

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confidence: 96%

Evaluation of Acoustic Noise Level and Impulsiveness Inside Vehicles in Different Traffic Conditions

Flor

Pena

Oliveira

et al. 2022

Sensors

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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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