Bat-Sonar Lenses

The bat sonar Lenses are the ones used by batman in the dark knight to detect his position or the location where he is at.

History
The Bat sonar Lenses are the ones that are a part of batman's eyes. It's a device that acts like a computer in the film to make Batman see his enemies or where they are hiding at. The sonar lenses also are sonar vision that let Batman see what he is doing. In the film Batman agrees with lucuis fox to give him a proper device for searching and listening to sounds and noises that he hears. Although he can detect his enemies from far away. The comminucation and the device is monitered on a super computer. It was used in some scenes when Batman met his enemy The Joker and when he hit batman in the face with a crowbar destroying his sonar vision. But Batman also used this in many fights and comminacated with lucuis fox better. The system was rigged to the cowl for just monitering suspicious activatys or things that happened. And when Batman was listening to people talking. It would become louder and he would notify fox to talk to him because he needs to trangalite his view or location.

Behind the scenes
The cowl is used in some of the scenes when the movie was filming. Christopher Nolan asked christian bale about the sonar vision that he used in the film and put it there so to make it look like it was rigged,

When the film was being made, It was proven that the Bat sonar Lenses were a special type of technology used by bruce wayne in the film. Although it does not say in the end of the movie of the cridits but is a part of Bruce Wayne's special gadgets in the film that he uses to track down criminals and robbers down with.