The inner ear is at the end of the ear tubes. It sits in a small hole-like cavity in the skull bones on both sides of the head. The inner ear has 3 main parts: Cochlea. The cochlea is the auditory area of the inner ear that changes sound waves into nerve signals. Semicircular canals.

The cochlea is the bony, spiraled, fluid-filled structure of the inner ear that is responsible for detecting sound. Specific regions of the cochlea respond most to specific frequencies. The entry point of the spiral is most sensitive to high frequencies and the end of the spiral is most sensitive to low frequencies.

The cochleais the part of the inner earinvolved in hearing. It is a spiral-shaped cavity in the bony labyrinth, in humans making 2.75 turns around its axis, the modiolus.

The cochlea is one of two main structures that make up the inner ear. The inner ear is located behind the eardrum and deep within the middle ear. The other structures are called the semicircular canals, which are responsible for balance, while the cochlea is involved in hearing.