The worst part is that it’s extremely easy for strangers to pull this off. According to Tarun Wadhwa, founder of tech advisory firm Day One Insights. “"It's going to be like Photoshop — something so easy, widespread, and well known that we stop tracking how it's being used against people personally and don't find it surprising,"[1] He goes onto say that these calls will ruin relationships and reputations. "I can easily imagine situations in which these sorts of voice-mimicry technologies are used to sow confusion, extort people and make fraud and scams far more precise.”
The easiest way to prevent such madness is to not answer the phone from any numbers that aren’t immediately recognizable. In addition, do not give these hackers any information and try your best to block the number. If its from your own phone, consider getting a new number.
[1] https://www.cnn.com/2019/04/06/tech/robocalls-scam-voice/index.html