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Frequency sensitivity in mammalian hearing from a fundamental nonlinear physics model of the inner ear

Karlis Kanders1, Tom Lorimer1, Florian Gomez1

  • 1Institute of Neuroinformatics and Institute of Computational Science, University and ETH Zürich Irchel Campus, Winterthurerstr. 190, 8057, Zürich, Switzerland.

Scientific Reports
|September 1, 2017
PubMed

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Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
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