A system for authenticating an identity of an end-user on an electronic device associated with a subscriber is provided. The system includes: a processor in communication with a server, the processor being configured to perform a method including: storing, at the server, a signal database registered to a client end-user, the processor being configured to retrieve, from the signal database, an ultrasound signature associated with the client end-user; establishing an active communication with the end-user on the electronic device to initiate an end-user voice call; identifying, using the end-user voice call, an ultrasound signature associated with the end-user; and dynamically verifying the ultrasound signature associated with the end-user with the ultrasound signature of the client-end user to validate the end-user voice call, while maintaining the active communication with the end-user.