Optical Measurements of Nonlinearity in the Middle Ear

نویسندگان

  • J. Peacock
  • J. Dirckx
چکیده

In the acoustic frequency range, the mammalian middle ear is known to behave as a fairly linear system. However, strong nonlinearity has been demonstrated in response to quasi-static pressure loads, and in previous work our research group was able to detect small nonlinear distortions at sound pressure levels of 96 dB SPL in the vibrations of the gerbil’s tympanic membrane. The tympanic membrane is the input to the middle ear; similar measurements were not performed at the output to the middle ear, the stapes footplate. Thus it is unclear how these nonlinear distortions change as the signal passes through the middle ear bones. To answer this question we made use of a measurement and analysis method, based on multisine excitation signals, to measure the nonlinearity in the rabbit ear.

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تاریخ انتشار 2015