The voice is the
next AI interface
AI now listens to visits, answers hospital phones and can copy a person's voice from a short clip. As an ER physician, I want clinicians and patients to get the benefits and avoid the traps. And I never want anyone to forget what a human voice does that no machine can.
Ambient scribes
Tools that listen to a visit and draft the note. They can give clinicians time back, if someone reads every draft.
AI phone agents
Voice agents that schedule, remind and answer routine questions. Patients deserve to know when they are talking to AI.
Voice cloning
A few seconds of audio can be enough to fake a voice. Families and hospitals need a plan.
The human voice advantage
In the ER, the way I say "you are safe now" matters as much as the words. My talk on the human voice advantage shows leaders how to use voice AI for the routine work while protecting the moments when a patient needs a real person.
Human plus AI, for voice
- Tell people when a voice is AI.
- Get consent before recording or cloning anyone's voice.
- Keep a human on the line for bad news, fear and confusion.
- Verify any urgent voice request on a second channel.
Written by Harvey Castro, MD, MBA, board-certified emergency physician. Last reviewed November 12, 2026.