NORTHWOOD, T. D. Criteria for Airborne Sound Insulation Between Dwellings. Canadian Acoustics, [S. l.], v. 4, n. 1, p. 2–8, 1976. Disponível em: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/382. Acesso em: 5 may. 2024.