An Innovation of Hearing Aid. MALAYSIAN JOURNAL OF INNOVATION IN ENGINEERING AND APPLIED SOCIAL SCIENCES (MYJIEAS), [S. l.], v. 3, n. 01, p. 33–37, 2023. Disponível em: https://myjieas.psa.edu.my/myjieas/article/view/24. Acesso em: 4 mar. 2026.