Outer and middle ear

4. Involving or relating to both ears.
8. muscle: The tiny muscle in the middle ear attached to the stapes.
11. air cells: A network of small, air-filled spaces in the mastoid process of the temporal bone.
12. Membrane: The membrane that separates the external auditory canal from the middle ear.
13. The middle bone of the three auditory ossicles in the middle ear.
14. of the malleus: The long process of the malleus attached to the tympanic membrane.
16. The third and smallest of the three auditory ossicles.
18. Relating to one ear.
22. intensity difference: The difference in loudness of a sound as perceived by each ear.
23. auditory canal: The passageway from the outer ear to the tympanic membrane.
24. Protective substance produced in the ear canal.

1. time difference: The difference in the time it takes for a sound to reach each ear.
2. joint: The joint between the incus and the stapes.
3. tympani muscle: A muscle within the middle ear attached to the malleus.
5. reflex: The involuntary muscle contraction in response to loud sounds.
6. tube: The canal that connects the middle ear to the nasopharynx.
7. The first of the three auditory ossicles in the middle ear.
9. The visible part of the outer ear.
10. The thickened rim of the tympanic membrane.
15. The three small bones in the middle ear.
17. ligament of the malleus: Ligament connecting the malleus to the anterior wall of the tympanic cavity.
19. ligament: The ligament attaching the base of the stapes to the oval window.
20. ad antrum: The opening that connects the tympanic cavity to the mastoid antrum.
21. lever: A mechanical advantage system formed by the curved tympanic membrane.