Yes, I could do that by pressing the button. But then you are essentially turning off a feature. It also means you have to walk up to the sound bar and switch the voice assistant on/off every time you use it.
I think 106rallye wasn’t suggesting to switch it off, but was wondering if there was anything near to the mic on/off button that was switching it on and off regularly and causing the Google Assistant to say “the mic is muted...” etc. Normally the mic switch is quickly tapped and the mic and its LED left on ready to listen for the ‘Hey Google’ wake words.