FRASER, J.; QUIRT, J. D. Enclosures to Reduce Noise from Heat Pumps: Four Case Studies. Canadian Acoustics, [S. l.], v. 13, n. 3, p. 19, 1985. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/546. Acesso em: 3 feb. 2023.