IKECHIAMAKA, F. N.; OKPALA, C.; LAWAL, A. DESIGN AND IMPLIMENTATION OF A LOW COST HEARING AID DEVICE. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 1, n. 1, p. 115–122, 2023. Disponível em: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1233. Acesso em: 23 oct. 2025.