Session 3- Middle Ear Physiology
Moderators: Peter M. Narins, Stefan Stenfelt
• 3-1. A sum of simple and complex motions on the eardrum and manubrium in gerbil
• 3-2. Middle-ear pressure gain and cochlear partition differential pressure in the chinchilla
• 3-3. Effects of spatial stapes excitations on round window motion patterns
• 3-4. On the effect of a dehiscence in the superior semicircular canal on hearing loss
• 3-5. Physiological motions of the stapes in human and guinea pig ears
3-1. de la Rochefoucauld and Olson from New York start this session by exploring the transmission properties of the gerbil middle ear. Comparing manubrium and TM velocities, they found that the manubrium did not display rigid body motion at all frequencies, and that its motion likely derived from particular resonances on the TM.
3-2. Ravicz and collaborators from Boston developed a small fiber-optic pressure sensor with which they measure sound pressures in the scala vestibuli and scala tympani, enabling the computation of both trans-cochlear partition differential sound pressure and middle ear pressure gain. The frequency response of these parameters in the chinchilla are discussed.
3-3. The next talk by Sim and colleagues from Zürich and Stuttgart describes a custom-made magnet-coil drive system which they use to produce three motion components of the guinea pig stapes: a piston-like motion, and rocking motion around two axes. The relationships between these motions and the volume displacements and mode shapes at the round window are examined.
3-4. The 4th talk by Hüttenbrink and colleagues from Cologne and Stuttgart examine the effect of experimentally introducing a fluid passage in the upper semicircular canal, mimicking the effect of a dehiscence. Hearing loss depended on the size and location of the hole, as well as on the load seen at the opening.
3-5. In the final talk of this session, Sim and colleagues from Zürich and Stuttgart present a comparative study of stapes motion in humans and guinea pigs.
Comments
Summary Session 3: ME Physiology
Session 3- Middle Ear Physiology
Moderators: Peter M. Narins, Stefan Stenfelt
• 3-1. A sum of simple and complex motions on the eardrum and manubrium in gerbil
• 3-2. Middle-ear pressure gain and cochlear partition differential pressure in the chinchilla
• 3-3. Effects of spatial stapes excitations on round window motion patterns
• 3-4. On the effect of a dehiscence in the superior semicircular canal on hearing loss
• 3-5. Physiological motions of the stapes in human and guinea pig ears
3-1. de la Rochefoucauld and Olson from New York start this session by exploring the transmission properties of the gerbil middle ear. Comparing manubrium and TM velocities, they found that the manubrium did not display rigid body motion at all frequencies, and that its motion likely derived from particular resonances on the TM.
3-2. Ravicz and collaborators from Boston developed a small fiber-optic pressure sensor with which they measure sound pressures in the scala vestibuli and scala tympani, enabling the computation of both trans-cochlear partition differential sound pressure and middle ear pressure gain. The frequency response of these parameters in the chinchilla are discussed.
3-3. The next talk by Sim and colleagues from Zürich and Stuttgart describes a custom-made magnet-coil drive system which they use to produce three motion components of the guinea pig stapes: a piston-like motion, and rocking motion around two axes. The relationships between these motions and the volume displacements and mode shapes at the round window are examined.
3-4. The 4th talk by Hüttenbrink and colleagues from Cologne and Stuttgart examine the effect of experimentally introducing a fluid passage in the upper semicircular canal, mimicking the effect of a dehiscence. Hearing loss depended on the size and location of the hole, as well as on the load seen at the opening.
3-5. In the final talk of this session, Sim and colleagues from Zürich and Stuttgart present a comparative study of stapes motion in humans and guinea pigs.
Peter M. Narins