Which of the following is not a function of the cochlea?

The cochlea is a critical structure in the inner ear responsible for processing sound. It performs several essential functions, including frequency separation, where it distinguishes different sound frequencies by utilizing hair cells that respond to specific frequencies of sound waves. In addition to this, the cochlea is involved in the transduction of sound waves, which refers to the conversion of mechanical vibrations caused by sound waves into electrical signals. This process is crucial for sending auditory information to the brain via the auditory nerve.

Regulating air pressure, however, is not a function of the cochlea. This function is primarily handled by the Eustachian tube, which connects the middle ear to the back of the throat and helps equalize air pressure on both sides of the eardrum. Thus, while the cochlea is integral to auditory processing, including frequency separation and sound wave transduction, it does not play a role in air pressure regulation.