Google is working on a feature called ‘Quick phrases’ that could kill the ‘Hey, Google’ wakeword for common tasks.
Pixel: How to enable 'Quick Phrases' on your Pixel smartphone
Google starts to roll out Quick Phrases, talk to Assistant without saying Hey Google - GSMArena.com news
How To Change OK Google to Something Else
19 Harry Potter Spells Your Android Phone Can Cast Using Google Assistant « Android :: Gadget Hacks
How to Change the Google Assistant's Voice on Your Phone or Smart Speaker - Guiding Tech
Is Google testing a way to wake Assistant with no OK Google?
How to Use Google Assistant's Driving Mode - Guiding Tech
VoiceGPT: AI GPT-3/4 Assistant for Android
Google working on option to trigger Assistant with the power button