KELSALL, T. Measurements and Prediction of Sound Levels in Quiet Urban Areas -- Urban Hum. Canadian Acoustics, [S. l.], v. 7, n. 2, p. 25–33, 1979. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/425. Acesso em: 28 mar. 2024.