{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T17:36:58Z","timestamp":1776274618260,"version":"3.50.1"},"reference-count":52,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2020,4,27]],"date-time":"2020-04-27T00:00:00Z","timestamp":1587945600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Vehicular acoustic noise evaluations are a concern of researchers due to health and comfort effects on humans and are fundamental for anyone interested in mitigating audio noise. This paper focuses on the evaluation of the noise level inside a vehicle by using statistical tools. First, an experimental setup was developed with microphones and a microcomputer located strategically on the car\u2019s panel, and measurements were carried out with different conditions such as car window position, rain, traffic, and car speed. Regression analysis was performed to evaluate the similarity of the noise level from those conditions. Thus, we were able to discuss the relevance of the variables that contribute to the noise level inside a car. Finally, our results revealed that the car speed is strongly correlated to interior noise levels, suggesting the most relevant noise sources are in the vehicle itself.<\/jats:p>","DOI":"10.3390\/s20092471","type":"journal-article","created":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T10:30:58Z","timestamp":1588069858000},"page":"2471","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Characterization of Noise Level Inside a Vehicle under Different Conditions"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4547-8302","authenticated-orcid":false,"given":"Daniel","family":"Flor","sequence":"first","affiliation":[{"name":"Department of Communications Engineering, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2767-5764","authenticated-orcid":false,"given":"Danilo","family":"Pena","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luan","family":"Pena","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2859-6136","authenticated-orcid":false,"suffix":"Jr.","given":"Vicente","family":"A. de Sousa","sequence":"additional","affiliation":[{"name":"Department of Communications Engineering, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9486-4509","authenticated-orcid":false,"given":"Allan","family":"Martins","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,4,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6662","DOI":"10.3390\/s100706662","article-title":"Wireless Multimedia Sensor Networks: Current Trends and Future Directions","volume":"10","author":"Almalkawi","year":"2010","journal-title":"Sensors"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"2779","DOI":"10.3390\/s7112779","article-title":"Robust Forecasting for Energy Efficiency of Wireless Multimedia Sensor Networks","volume":"7","author":"Wang","year":"2007","journal-title":"Sensors"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2201","DOI":"10.3390\/s7102201","article-title":"Multi-agent Negotiation Mechanisms for Statistical Target Classification in Wireless Multimedia Sensor Networks","volume":"7","author":"Xue","year":"2007","journal-title":"Sensors"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Jennehag, U., Forsstrom, S., and Fiordigigli, F. 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