I am talking about sound not the term for capacity.
If your speakers are turned off, you can't hear anything.
Make sure that your speakers are turned on so you can hear things.
Hearing things is good especially when something has sound.
So crank it up, to a moderate level, so as to not disturb your neighbors, roomates, or whatever the case may be.
This equation can be used to determine the intensity of sound in terms of I expressed in decibels
Basically if the I or I0 is bigger than 0 than you should get some sound. Or so I think.
A bel (symbol B) is a unit of measure of rations, such as power levels and voltage levels.