KIAT NG, Poh; SIONG JEE, Kian; WAH THONG, Li; AI YEOW, Jian. Design Innovation and Validation of a Non-Electric Hearing Aid for Improved Usability. International Journal of Engineering & Technology, [S. l.], v. 7, n. 3.7, p. 90–94, 2018. DOI: 10.14419/ijet.v7i3.7.16220. Disponível em: https://sciencepubco.com/index.php/ijet/article/view/16220.. Acesso em: 3 may. 2024.