This image shows the anatomy of the outer, middle, and inner ear. The three ear ossicles are located in the middle ear (malleus, incus, and stapes). The stapedius and tensor tympani in the middle ear function to lower the volume of excessive sounds. The eustachian or auditory tube in the middle ear drains middle ear fluid. The auditory tube is more parallel in infants and not as parallel in adults. This is the reason why infants are more susceptible to ear infections.