[Fun project] Star Trek voice activator for Apple Siri

Ever since "Scotty" comically spoke into a Macintosh mouse trying to get the Mac to respond in Star Trek movie 4, I have been fantasising about getting Siri to work the exact same way.
.
No "Hey Siri".
No tapping my Airpods in my ear.
No having to pull out my iphone and tapping a button.
Something omnipresent and always available.
.
Something simple like an always listening high resolution microphone in a simple device like a Star fleet broach or pocket pin or clip that is always with you.
.
Something occurs to you. You simply say "Computer?". It recognises the summons and replies "Yes". Then you start your Siri or Alexa commands.
.
So how to achieve this?
Ok how about this? A bluetooth device with a very simple voice recognition system and a small personal speaker. You turn it on and all it does is wait for the prompt "computer". When it hears the prompt it replies "Yes" and then triggers a handoff via Siri remote device switch (same as the volume button on Apple wired headphones) or in-car bluetooth hands free trigger to allow the iphone to take over the conversation using Siri or Alexa.
.
It seems like splitting straws but Siri never quite cut it as a Star Trek computer equivalent. Next device needed? "Beam me up Scotty".