CHEN, Yantai. DTMF Signal Detection and Parameter Optimization Based on Goertzel Algorithm. International Journal of Advance in Applied Science Research, [S. l.], v. 4, n. 7, p. 17–21, 2025. Disponível em: https://h-tsp.com/index.php/ijaasr/article/view/113. Acesso em: 3 nov. 2025.