Mechanics of a single-ossicle ear: II. The columella footplate of the pigeon

  title={Mechanics of a single-ossicle ear: II. The columella footplate of the pigeon},
  author={Anthony W. Gununer and J. Smolders and R. Klinke},
  journal={Hearing Research},
The motion of the columella footplate (CFP) was measured in the pigeon using the Mössbauer technique. At the upper frequency limit of the cochlea the measured CFP response exhibited anti-resonant phenomena. These high-frequency responses were dependent on the orientation of the radiation detector, in a way which could not be explained by the cosine effect. The dependence of the recorded phase response on the measurement axis implies an additional vibration mode, which was out of temporal phase… Expand
Mechanics of a single-ossicle ear: I. The extra-stapedius of the pigeon
The motion of the conical peak of the tympanic membrane (TM) at the tip of the extra-stapedius (ES) and of the columella footplate (CFP) were measured in the pigeon using the Mössbauer technique. TheExpand
A single-ossicle ear: Acoustic response and mechanical properties measured in duck
The results indicate which mechanical parameters are essential to the good functioning of the avian ME and provide a first estimation of their values. Expand
Acoustic input impedance of the avian inner ear measured in ostrich (Struthio camelus)
Values of the inner ear impedance in the ostrich are one to two orders in magnitude smaller than what is found in mammal ears. Expand
Quasi-static and dynamic motions of the columellar footplate in ostrich (Struthio camelus) measured ex vivo
Ostrich footplate motions are experimentally investigated in the ostrich using a post‐mortem approach, suggesting that CFP motion is predominantly piston‐like below 1 kHz, while at higher frequencies the motion becomes too complicated to be described as purely piston‐ like or rocking. Expand
The roles of the external, middle, and inner ears in determining the bandwidth of hearing
  • M. A. Ruggero, A. Temchin
  • Computer Science, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 2002
It is proposed that the tonotopic organization of the cochlea plays a crucial role in setting the frequency limits of cochlear sensitivity and hence in determining the bandwidth of hearing. Expand
A comparative study of avian middle ear mechanics
Measurements of the middle ear transfer function in 39 taxonomically diverse avian species are reported to provide a broad survey of avian middle ear function, and the observed trends provide a method with which to begin to predict the response of single ossicle middle ear systems. Expand
Laser interferometric measurement of the micromechanics of the inner ear
Recent advances in optical techniques for vibration measurement have made it feasible to purchase commercially available laser Doppler velocimeters that, in combination with a light microscope, areExpand
The Middle and External Ears of Terrestrial Vertebrates as Mechanical and Acoustic Transducers
The external and middle ears of terrestrial vertebrates work together to transform sound in free air to sound pressures and volume velocities in the fluid in the vestibule of the auditory inner ear.Expand
A new and improved middle ear
The present review argues that the performance of the middle ear of amniotic vertebrates approaches that of an ideal pressure transformer over a wide range of frequencies. Firstly, we note thatExpand
How flexibility and eardrum cone shape affect sound conduction in single-ossicle ears: a dynamic model study of the chicken middle ear
It was shown that the outward-pointing cone shape of theChicken middle ear enhances the middle-ear pressure gain compared to a flat eardrum shape, and the pressure gain decrease was assigned to an increase in bending behavior of the extracolumella and a reduction in piston-like columella motion in the model with an inward-pointer. Expand


Mechanics of a single-ossicle ear: I. The extra-stapedius of the pigeon
The motion of the conical peak of the tympanic membrane (TM) at the tip of the extra-stapedius (ES) and of the columella footplate (CFP) were measured in the pigeon using the Mössbauer technique. TheExpand
Basilar membrane motion in the pigeon measured with the Mössbauer technique
The existence of a travelling wave mode, propagating from base to apex, was established for papillae in apparently good physiological condition, and tonotopy of BM CF was still evident, although the correlation with distance was less. Expand
Determinants of High-frequency Sensitivity in the Bird
In two previous publications (Gummer et al., 1986, 1987) we reported the presence of anti-resonances in the middle-ear transmission function of the pigeon. The anti-resonances were often associatedExpand
Middle-ear characteristics of anesthetized cats.
  • J. Guinan, W. Peake
  • Physics, Medicine
  • The Journal of the Acoustical Society of America
  • 1967
From measurements of stapes displacement at known sound pressures, a transfer characteristic for the middle ear with the tympanic cavities open is calculated, which suggests that the incudo‐malleolar joint flexes. Expand
A comparative analysis of middle-ear function in non-mammalian vertebrates.
The results suggest that the limits of high frequency hearing in these species are related to the transmission characteristic of the middle-ear. Expand
Input impedance of the cochlea in cat.
Tones were delivered directly to the stapes in anesthetized cats after removal of the tympanic membrane, malleus, and incus. Measurements were made of the complex amplitudes of the sound pressure onExpand
The Mechanics of the Basilar Membrane and Middle Ear in the Pigeon
The frequency selectivity of primary auditory afferents has been allocated preferentially to different structures in various classes of tetrapod animals: to the basilar membrane (BM) in mammalsExpand
Basilar membrane and middle-ear vibration in guinea pig measured by capacitive probe.
The results confirm the general features of previous measurements but demonstrate that the mechanical tuning properties of the basilar membrane are equally poor at low SPLs and under excellent physiological condition of the cochlea, as indicated by the threshold of the gross cochlear action potential to clicks. Expand
A model for signal transmission in an ear having hair cells with free-standing stereocilia. II. Macromechanical stage
A model of the signal-processing properties of the macromechanical system of the alligator-lizard middle and inner ear is developed, which fits the experimental results satisfactorily, allows correlations between specific structures and response behavior, and predicts the macROMechanical transfer function. Expand
Auditory structure and function in the bird middle ear: An evaluation by SEM and capacitive probe
1. The anatomic structures of the mouse middle ear were identified and examined with scanning electron microscopy and the area and lever ratios were measured in a number of ears. 2. Expand