Echolocation: Volume Control By Amanda Tromans

In Echolocation: Volume Control by Amanda Tromans, she explains how some animals and machines use sound to locate things instead of using vision like others. For example, bats, dolphins, and submarines all do this but with a few differences. This paper is more like a review so it does not show specific steps. She explains in the beginning why those exactly use echolocation; this is basically the use of echoes and soundwaves. Those echoes and soundwaves are bounced off many objects so they can get a clear understanding of their location. Her question is basically that when objects get closer the echoes get lost then in turn the sound should get louder. So, in the end when it comes to a sonar emitter how can it be deafened. She then states how in one issue how two people show how dolphins end up coping up with this.
The methods used were four hydrophones that were drowned into the ocean to record sounds made by the dolphins. They put these hydrophones into a symmetrical array because the sounds that were received needed to be very close to the sounds well clicks that the animals made this let the author know its distance. The results were once they zoomed into the array, the sound they made would be decreased by six decibels which are a measure of sound. Insuring that the echoes did not get louder the closer they got to it. She also gives another example of what bats do how they keep their sounds constant but decrease the way they hear after they make that sound so it increases with time. So, that echo ends up being heard the same if far or near. This is exactly how submarine sonars are used, she then says the authors of that issue say dolphins adjust the way they summit sound because of the way their ears are shaped. In the end, they connect the distance and amplitude because of how the clicks are