A Young Man Is Cleaning His Ear by Sliding a Cotton Swab into the External Acoustic Meatus as Far as He Can. He Is Met with Some Resistance and, Thinking the Swab Has Hit Earwax, He Pushes Harder. He Feels a Sharp, Extreme Pain. After the Initial Shock, He Notices That All He Can Hear from That Ear Is a Constant Ringing and Nothing Else. What Damage Has He Most Likely Done to the Ear