Add 'rings' from a point?

[musach21]

Simple quick one: using the particle system, how can I make a sound wave like emission of about 3 rings come from a central point? Almost like a ripple effect. Seem to be struggling with which particular settings to tweak

[ArenMook]

Particle system isn't NGUI, so I would suggest asking on the Unity's questions page.

With NGUI the same equivalent would be to create 3 temporary textures (ALT+SHIFT+T) with the desired particle texture/shader on it and make them tween scale and alpha to get the desired result. At the end of the tween destroy them.