Please, please don't. I've worked for enough corporate companies to know the end result of such a feature: metrics about how communicative you are in team meet

Please, please don't. I've worked for enough corporate companies to know the end result of such a feature: metrics about how communicative you are in team meetings, goals set around that metric, and inevitably people babbling on meetings just to have their percentage match whatever's required to check the box for a promotion/bonus. If someone talks too much, just tell them to shut up (softly and in business speak).