E.g. is there a way to trick 'AIs' on the other side of the phone without a human noticing it? For example 'tricking' something like Contact Center AI from google https://cloud.google.com/solutions/contact-center?hl=en
They can also be embedded into songs so that humans hear one thing but the computer does something different: https://www.usenix.org/conference/usenixsecurity18/presentat...
There have also been attacks on computer vision systems (like in cars) that can make them suddenly brake or misidentify a lane or street marker, etc., but in ways not obvious to humans: https://adversarial-designs.shop/blogs/blog/adversarial-patc... or to fool facial recognition systems into thinking you're someone else (in a way that won't fool anyone who actually knows you).
And more broadly, any sort of obscured malware tries to deliver a malicious payload while pretending to be something else to the human who runs it.