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Characterization of Frequency Separation in Polymer Membranes Mimicking a Human Auditory System  

Song, Won-Joon (Department of Nature-Inspired Nano Convergence System, Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery & Material)
Bae, Sung-Jae (Department of Nature-Inspired Nano Convergence System, Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery & Material)
Kim, Wan-Doo (Department of Nature-Inspired Nano Convergence System, Nano Convergence and Manufacturing Systems Research Division, Korea Institute of Machinery & Material)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.31, no.5, 2011 , pp. 516-521 More about this Journal
Abstract
The basilar membrane, an important functional part of the cochlea, is responsible for spectral separation of vibration signals transmitted from the stapes. In current study, scaled-up polymer membranes designed by mimicking the human basilar membrane were used for investigation of the frequency-separation characteristic. Displacement field formed on each polymer membrane was acquired by Laser Doppler scanning vibrometer and post-processed frequency-wise. The locations of the maximum displacement along the centerline were identified and collected for individual frequency range to produce the frequency-position map of individual polymer membrane. The influences of the membrane thickness and material properties on the variation of the frequency separability were discussed.
Keywords
Cochlea; Basilar Membrane; Polymer Membrane; Laser Doppler Scanning Vibrometer; Frequency-Position Map;
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