1. A synthesized voice authentication device, comprising: an audio input device; a processor; and a non-transitory memory device storing instructions, that when executed by the processor, cause the synthesized voice authentication device to: capture, via the audio input device, an audio signal of a voice of a user; generate a randomized audio frequency signal based on at least one of a biometric signal associated with the user and a geographic location associated with the user, the biometric signal and the geographic location captured at the synthesized voice authentication device concurrently with the audio signal; modify, the audio signal with the randomized audio frequency signal to generate a modified audio signal, wherein the randomized audio frequency signal corresponds to a sub-audible frequency; communicate, the modified audio signal as a synthesized voice signal associated with the user; and receive, from a remote device, an authentication indication of the user based on the synthesized voice signal.