Multiple simultaneous event volume

Question

Hi there,

I have an event in game which may be called either once or up to 5 times in game roughly simultaneously, depending on how many time a player does a certain prior action. When playing one event, it's at a perfect volume, when playing all five, the volume is obviously much louder. Is there a single solution to normalizing the volume of these specific events so that when all 5 get called, the total volume isn't exponentially louder?