The term 'middle ears' refers to the structures of the ear that are responsible for transmitting sound from the outer ear to the inner ear. The two main components of the middle ear are the cochlea and the tympanic membrane. The cochlea, abbreviated as COBS, is a snail-shaped organ located in the inner ear that is responsible for converting sound waves into electrical signals that can be interpreted by the brain. The tympanic membrane, abbreviated as TYMPANA, is a thin membrane located between the outer and middle ear that vibrates when sound waves enter the ear, allowing sound to travel to the inner ear. Together, these two structures form the middle ear, which is essential for hearing.