The spell mirror image creates figments of the caster.
These figments separate from you and remain in a cluster, each within 5 feet of at least one other figment or you. You can move into and through a mirror image. When you and the mirror image separate, observers can’t use vision or hearing to tell which one is you and which the image. The figments may also move through each other. The figments mimic your actions, pretending to cast spells when you cast a spell, drink potions when you drink a potion, levitate when you levitate, and so on.
In the DnD faq, it states that you can have all the figments and yourself in the same square.
So all of that seems simple enough, however, the last paragraph in the spell is confusing.
An attacker must be able to see the images to be fooled. If you are invisible or an attacker shuts his or her eyes, the spell has no effect. (Being unable to see carries the same penalties as being blinded.)
So I am wondering, if someone closes their eyes, do they still need to know which square my real character is in? Can they do this using the listen check, and will this fail if the mirror images are in different squares to the original caster?