Human Sonar Devices - Can We Build Them?

Many species on this planet use sonar and sound tohearing aids and a pinging sound wave of a certain
navigate in the dark or locate objects around them infrequency, one, that was beyond the human hearing
the ocean. Bats and Dolphins for instance use soundrealm. It should work perfectly. It has many
waves in this fashion. Not long ago an astuteapplications in many industries and some military
gentleman stated; "Why, we could make device thatapplications as well.
was very small and attached to the human ear orIn fact, before retirement, I can recall that we used
implanted to act as a human sonar."to use sonar waves at the car washes to know
Well, is this even possible? I mean that would bewhere the car was, now they use optical sensors.
pretty interesting as others have recently statedSmall UAVs and robots have a sonar-like system in
with regards to this concept. Do you think it isthem. One of the recent DARPA grand challenge
possible? Personally, I am pretty certain that yes it iscontestants used stereo-type sonar. Well, why not
possible, but I have not pursued this concept, as I'vemake one to interface with the human ear, piece of
been working on other stuff. Still, I do not see whycake. Hmm, I bet they already exist, I am sure
we couldn't build it or make such a device.someone has considered this the prior? Think on this.
It would be very easy to design with high-efficiency