C. Lobato L, Brandão E. Numerical and experimental analysis of acoustic impedance and sound absorption measurements using the in situ technique with two microphones. Acústica e Vibrações [Internet]. 2017 Dec. 28 [cited 2024 Oct. 22];32(49):31–42. Available from: https://revista.acustica.org.br/acustica/article/view/aev49_impedancia