Abstract: An electrical wire includes a core comprising an electrically conductive material that conducts electricity along the length of the electrical wire. The core also includes an acoustic conductive material that conducts acoustic waves along the length of the electrical wire. The core also includes an acoustic waveguide that provides internal reflection for the acoustic waves conducted through the core, and that guides the acoustic waves along the length of the electrical wire. The response acoustic wave signals may be compared against a failure model for the wire in order to determine the reliability of the electrical wire.