http://www.physicscentral.com/news/news-04-05.html
Thoughts?
I think it is fascinating! And...what took them so long?!
What is especially intriguing is:
One of the features Mueller thinks would be useful to sonar technologists is the tragus, a spike shape in front of the outer ear opening. You can find your own tragus by putting your finger in your ear, palm toward your face. Your fingertip is touching your tragus.
The tragus is a new feature in antenna design that the researchers hope will allow them to listen to echo sound from two directions simultaneously. Mueller plays with the shapes of the bat ears and the position of the tragus by altering the 3-D shape representation and then observing how the changes in shape affects the interaction between ear surface and sound.