Pérez-Ruiz, S. J., Damián- Zamacona, R., Quintana-Thierry, S., Bañuelos-Saucedo, M. A. and Castillo-Hernández, J. (2004) “Hearing aid. Measurement of electroacoustical characteristics”, Journal of Applied Research and Technology, 2(03). doi: 10.22201/icat.16656423.2004.2.03.574.