Transmission of the Acoustic Signal through the Middle Ear – An Experimental Study
The transmission of the acoustic signal through the middle ear structures was determined on the basis broad-band measurements (400 Hz to 10 kHz) of the stapes, the round window and the Teflon piston stapes prosthesis displacements. The measurements were made in 4 fresh cadaver temporal bones with AC stimulation at 90 dB SPL applied to the external auditory canal. Two conditions in the same specimen were measured: the physiologial and the implanted state. A PSV 400 Scanning Laser Doppler Vibrometer system (Polytec GmbH, Waldbronn, Germany) was used to determine the effect of the Teflon piston stapes prosthesis implantation on transmission of the acoustic signal through the middle ear. It was shown that the cochlear stimulation after stapes piston prosthesis implantation, in comparison with a physiological specimen was reduced several times.
KeywordsAcoustic Signal Temporal Bone External Auditory Canal Round Window Membrane Stapes Footplate
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- 4.Kwacz, M., Wysocki, J., Mrowka, M.: PAK 57, 25–29 (2011)Google Scholar