In the first case, the ear spoon enters the external ear canal, causing the cerumen in the external ear canal to touch the tympanic membrane and cause a sound. In another case, the external ear canal is shallow and the external ear canal is S-shaped, so when the ear-extracting spoon is flexed into the external ear canal, there is no obvious cerumen in the external ear canal, but the spoon touches the eardrum directly. Because the outer ear canal tympanic membrane is thin, the thickness of the tympanic membrane is only 0.2mm, when the spoon touches the tympanic membrane, there will be an obvious ringing sound, similar to the sound of a finger rubbing thin paper, and in this case, the patient will also have a painful sensation and needs to avoid further ear extraction to prevent the occurrence of tympanic membrane perforation and inflammation.