DOGRA, sourabh; GUPTA, A. TEST METHOD TO DETERMINE THE ACOUSTIC PROPERTIES OF BUILDING MATERIALS BY USING FOUR MICROPHONE IMPEDANCE TUBE. Journal Akustika, [S. l.], v. 40, n. 40, 2021. DOI: 10.36336/akustika20214036. Disponível em: https://journalakustika.com/index.php/akustika/article/view/57. Acesso em: 25 oct. 2021.