A three compartment cochlear model scala vestibuli
scala media
scala tympani

scala vestibuli

scala media

scala tympani

 

cochlear channel with three compartments functionality

scala vestibuli, Reissner membrane, tectorial membrane, scala media, organ of Corti, scala tympani, basliar membrane

 

The explanation of the different consequences in behavior for the calculation models that serve as analogue geometries for Von Békésy’s two-channel model, and the actually existing three-channel model, is shown in this figure.

heerens-a-pressure-difference

Our model using three contributing compartments, as shown in (C), has a pressure stimulus Δp on both the Reissner membrane and the basilar membrane, which forces both membranes to move in outward directions relative to the scala media because the endolymph fluid in this scala media is at rest, while the perilymph fluid in both the scala tympani and scala vestibuli moves with a velocity v , directed along the core of each of these two scalae. According to Bernoulli’s law, this pressure difference on either side of both the Reissner membrane and basilar membrane is represented.

 

by Willem Christiaan Heerens     &            Figures

 

 

The explanation of the different consequences in behavior for the calculation models that serve as analogue geometries for Von Békésy’s two-channel model, and the actually existing three-channel model, is shown in this figure.

vonbekesy-no-pressure-difference

Although the perilymph fluid on either side of the scala media moves in opposite directions as shown in (A), in simplification (B), we see that the two pressure impacts Δp on the basilar membrane, evoked by both fluid movements in scala vestibuli and scala tympani along the basilar membrane, will be identical in strength, but opposite in direction. This means they will cancel each other’s stimulus impact on the basilar membrane; the basilar membrane does not have a net stimulus and will remain at rest.

 

figures figure 3

Applying Physics Makes Auditory Sense

A New Paradigm in Hearing          Fig. 3. Cross section of the cochlear channel with two and three compartments functionality

fig-3 fig-3-txt

 

 

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scala vestibuli, Reissner membrane, tectorial membrane, scala media, organ of Corti, scala tympani, basliar membrane, Auditory-pathway, Auditory-periphery, Auditory-transduction, Basilar-membrane, Bernoulli, Bernoulli-effect-hydrodynamic-behavior, Biophysical-basis, Cochlea, Cochlear, Cochlear-mechanics, Ear, Ears, Efferent-feedback-control, auditory-physics, Fluid, human-ear, Hair-cells, Hearing-inner-ear, Inner-ear, Middle-ear, Middle-ear-model, Organ-of-Corti, Outer-hair-cell, Oval-Window, Perilymph, Physical-and-physiological-mechanisms, Physiology-of-the-Ear, Round-window, Sound-and-Ears, Sound-transmission, Stapes, Tonotopy, Vibrations, the-Bernoulli-effect-the-basilar-membrane-(BM)-is-activated-by-the-under-pressure-on-the-wall-of-the-perilymph-duct

“This revised study of the entire set of mechanisms and functions, actually a new and exciting paradigm, enables us to explain most if not all of the, thus far unsolved, major mysteries in the functioning of the auditory sense.”