Understanding how ultrasonic wave attacks can exploit smartphone voice recognition-
[cyware.com]
Attackers can send commands to phones to make calls, take images, or read the contents of the victims' text messages.
Ultrasonic waves can pass through solid surfaces, allowing attackers to perform a remote attack within a small radius.
Researchers found a security loophole in smartphone voice recognition systems due to which ultrasonic waves (inaudible to humans) can activate Siri and Google Assistant.
I would hope by me turning off my microphone, that this trick wouldn’t. How ever, I doubt even that would help.
There are some apps that could disable temporarily the microphone and cameras, and I found they do work. Still, these days you can never be too sure.
@SpikeTalon I'm definitely looking into this.