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Advanced Methodology for Damping Characterization of the Human Tympanic Membrane Using High-Speed Digital Holographic
L F Caminos1, J Garcia-Manrique1, Jeffrey T Cheng2,3
1Department of Civil Engineering, Materials and Manufacturing, School of Engineering. University of Malaga. Spain.
Research Square
|April 3, 2026
Summary
This study introduces a new method to measure frequency-dependent damping in the human tympanic membrane (TM). The technique uses holographic measurements to reveal how damping varies with frequency and location on the TM.
Area of Science:
- Biomechanics
- Auditory Science
- Experimental Physics
Background:
- Damping is crucial for middle-ear mechanics but difficult to measure accurately.
- Existing methods show significant variability in damping estimates for the tympanic membrane (TM).
- Understanding TM damping is essential for accurate auditory system models.
Purpose of the Study:
- To develop and validate an experimental methodology for estimating frequency-dependent damping in the human tympanic membrane (TM).
- To overcome limitations of conventional techniques in analyzing damping in systems with multiple overlapping modes.
- To provide robust damping values for improving finite element models of middle-ear mechanics.
Main Methods:
- Utilized high-speed digital holography (HDH) to capture transient displacement fields of the TM.
- Employed Short-Time Fourier Transform (STFT) analysis on holographic data.
- Applied acoustic click excitation to cadaveric human temporal bones.
Main Results:
- Demonstrated frequency-dependent damping across the human tympanic membrane (TM).
- Observed spatial variations in damping and the influence of ossicular chain loading.
- Successfully isolated free-vibration decay in the time-frequency domain for damping analysis.
Conclusions:
- The proposed HDH and STFT methodology provides a practical framework for extracting damping information from TM experiments.
- The results offer robust, frequency-dependent damping values crucial for validating and calibrating middle-ear finite element models.
- This approach enhances the understanding of human auditory system mechanics.
