a new paradigm in hearing a3ccm-apmas-eakoh-easms-bcsth-anpih ...

a three compartment cochlear model

applying physics makes auditory sense

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externally activated spring-mass system

bone conduction signal transfer hypothesis

a new paradigm in hearing

by Willem Christiaan Heerens

 

indications in hearing literature wever and lawrence

 

“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.”
Heerens and De Ru
“Not the end, but merely a beginning!”
“Bernoulli's Law”
“The incoming sound signal is transformed into the sound energy signal inside the cochlea. It is this signal that evokes both the mechanical vibrations in the basilar membrane and the corresponding electrical stimuli in the organ of Corti, stimuli that are subsequently sent to the brain in a frequency selective manner.”
“differentiates and squares the incoming sound stimulus”
“Based on our insights derived from literature we arrive at two more basic principles that form the cornerstones of our model: namely, the fact that the attenuation of the eardrum and the ossicular chain are at the root of the extremely large dynamic range of our auditory sense, and the fact that the bone conduction phenomenon is actually the result of the push-pull movement of the perilymph fluid instead of the presumed deformation of the bony structures.”

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Abstract Background A profound and critical study, focusing on the consistent application of physics in the currently accepted theory of auditory functioning, leads us to the conclusion that the fundamental laws of physics have either been misused or misinterpreted in crucial sections. Methodology and Principal Findings As a result we propose a new cochlear model based on the hypothesis that, conform to Bernoulli's law, the perilymph velocity evokes a difference in pressure proportional to the square of this velocity, all over the basilar membrane. Mathematically, this signifies that the cochlea differentiates and squares the incoming sound pressure signal. In terms of physics, it means that a sound energy signal is offered to the organ of Corti. Functioning as a Fourier analyzer, the organ of Corti subsequently converts these incoming signals into the sound energy frequency spectrum that is transferred to the auditory cortex. In addition, the combined action of the ossicular chain and the eardrum is hypothesized to provide for both permanent volume control and overload protection. Finally, bone conducted signals are considered to be evoked by the perilymph fluid moving back and forth out of the cerebrospinal cavity, via the cochlear aqueduct, towards the scala tympani. This new description of cochlear functioning based on differentiation and squaring has led to the development of a number of sound experiments. In these sound experiments frequency compositions that are based on slightly modified harmonic series evoke beat phenomena in the organ of Corti. Conclusions These phenomena, although inexplicable within the current hearing theory – and therefore attributed to brain functioning – can be pre-calculated based on theoretical grounds. These pre-calculable beat patterns that are actually heard by any listener at sound levels slightly above the hearing threshold serve as experimental evidence for our new cochlear model.