Sound attenuation per particle

Hi,

I’m trying to create an effect where the sound volume increases when the character puts their hand out to a particle. So essentially there’s a sound attenuation sphere per particle (I’m using Leap Motion for the hand tracking). I’m fairly new to Unreal and this might be quite expensive but was wondering what the best way it was to create this effect of manipulating sound when the user reaches out to a particle.

Thanks in advance! :smiley: