Is it ethical for A.I. to have a human voice?

On May 8th, Google rolled out Duplex, a new AI technology that is able to hold human-sounding conversations. The tech drew astonishment across a wide spectrum of the internet at the ability of the AI to interact with an unsuspecting human when making an appointment for a haircut. Duplex was able to adjust to the information given and even inserted a few fillers like "uh" and "hmm" into its speech, coming across quite realistically. And what's even better - the AI accomplished its task, booking the appointment. While undeniably impressive, Google's demonstration also raised a host of concerns focused on what it means that an AI can be made to sound like a human.