By temporarily altering the shape of the pinnas with plastic molds, researchers in the Netherlands found that indeed, people with new pinnas had a hard time locating sound sources.
Although ants usually communicate through smell, they also use sound to send distress calls and warnings about danger. Since they don’t have ears, scientists believe that they sense sound vibrations in their knees.
By trapping all sorts of dirt and debris, the waxy stuff your ear produces helps keep the ear clean. Q-tips are commonly used to clean the wax from your ear when it gets to be too abundant.
Have you ever tried to listen while underwater? What is audio like underwater?