Spontaneous otoacoustic emissions (OAEs) are sounds produced by the inner ear without any external stimulation. These emissions occur naturally in many healthy individuals and are thought to be a byproduct of the functioning of the cochlea, which is responsible for hearing. Spontaneous OAEs can be detected using sensitive microphones placed in the ear canal. These emissions are typically measured in a quiet environment and can vary in frequency and intensity among individuals. The presence of spontaneous OAEs is often used as an indicator of normal cochlear function and can help in assessing hearing health in both children and adults.