Transient response of the human ear to impulsive stimuli: A finite element analysis

J Acoust Soc Am. 2018 May;143(5):2768. doi: 10.1121/1.5026240.

Abstract

Nowadays, the steady-state responses of human ear to pure tone stimuli have been widely studied. However, the temporal responses to transient stimuli have not been investigated systematically to date. In this study, a comprehensive finite element (FE) model of the human ear is used to investigate the transient characteristics of the human ear in response to impulsive stimuli. There are two types of idealized impulses applied in the FE analysis: the square wave impulse (a single positive pressure waveform) and the A-duration wave impulse (both of positive and negative pressure waveforms). The time-domain responses such as the displacements of the tympanic membrane (TM), the stapes footplate (SF), the basilar membrane (BM), the TM stress distribution, and the cochlea input pressure are derived. The results demonstrate that the TM motion has the characteristic of spatial differences, and the umbo displacement is smaller than other locations. The cochlea input pressure response is synchronized with the SF acceleration response while the SF displacement response appears with some time delay. The BM displacement envelope is relatively higher in the middle cochlea and every portion of BM vibrates at its best frequency approximately. The present results provide a good understanding of the transient response of the human ear.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acoustic Stimulation / methods*
  • Cochlea / anatomy & histology
  • Cochlea / physiology*
  • Ear Canal / anatomy & histology
  • Ear Canal / physiology*
  • Ear, Middle / anatomy & histology
  • Ear, Middle / physiology*
  • Finite Element Analysis*
  • Humans
  • Models, Biological
  • Vibration*
  • Viscoelastic Substances

Substances

  • Viscoelastic Substances