The paper details the movements of the auditory ossicula in exposure to low- and high-frequency sounds. Low-frequency sound causes the hammer to vibrate along the line crossing the tympanic anterior and posterior folds. Because of the screw shape of the anvil-hammer junction these hammer movements produce dislocation of the long anvil process along the base of the stapes. Due to the spherical shape of the anvil-stapes junction the above shift gives rise to pedal movements of the base of the stapes by the transverse short axis of the vertibular window. High-frequency sound waves are transmitted by the crest from the walls of the middle ear cavity to the short hammer process. This produces its rotation responsible for the anvil long process shift across the vestibular window, up and down. These vibrations result in vibrations of the base of the stapes crosswise the vestibular window.