problem with changing the volume of one card

Why can't I change the volume in one tab? During a meeting, for example, the radio is on, and it is much louder than the meeting, and you cannot adjust the volume of a single tab. This is very bothersome, not only in the above case. These pages determine the volume themselves. Some have regulations on the site, but not always. I am very tired of this problem. Are there any ways to change the volume of a given tab?