can i have live transaciption without letting the host knows?

i have a lot of meetings with Americans but i can't understand what they are saying. the meeting of 30 members they all can listen and speak in english unlike me i can speak in english but i cant improve my listening skills

so i need to know if im able to to have live subtitle without letting the host know  or letting the host do something so that i can understand what they are saying through sub title.

thanks for any help