ShooterGame sound system

Hi, I want to learn more from the ShooterGame sound system. I’ve seen that it uses stereo sounds with the first person mesh and mono sounds (with attenuation) with the third person mesh, through anim notifies. The problem is that if I use an anim notify on a third person mesh animation, I can hear the sound even if I’m using the first person mesh.
What can I do to have the sounds playing correctly?