Abstract
Using a tiny magnet and a commercial SHE r.f. SQUID magnetometer setup, supplemented by an adjustable second order gradiometer, amplitude and phase spectra of vibrations of human middle ears were determined without disturbing the anatomy of middle ear and intact cochlea. The magnet had a mass of 1.5 mg and was positioned at the tip of the malleus (umbo), halfway the malleus near the processus brevis and on the anterior crus of the stapes. Post mortem changes of vibratory umbo displacements were measured in human temporal bones and guinea pigs. In a group of twelve ears the mean and standard deviation were determined at the three positions as mentioned above at 80 dB SPL stimulation level. These amplitude and phase spectra yielded information about the transfer characteristics of the middle ear and about the projection (into the tympanic plane) of a rotation axis.
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References
Bekesy, G. v. “Uber die Messung der Schwingungsamplitude der Gehörknöchelchen mittels einer kapazitiven Sonde,” Akust. Z. 6, 1 (1941).
Gundersen, T. and Hrigmoen, K. “Holographic Vibration Analysis of the Ossicular Chain,” Acta Otolaryngol. 82: 16–24, 1976.
Rutten, W.L.C., Peters, M.J., Brenkman, C.J., Mol, H., Grote, J.J. and van der Marel, L.C. “The Use of a SQUID-Magnetometer for Middle Ear Research,” Cryogenics, Sept. 1982; 457–460.
Tonndorf, J. and Khanna, S.M. “Tympanic-Membrane Vibrations in Human Cadaver Ears Studied by Time-Averaged Holography,” J. Acoust. Soc. Amer. 52, 1221–1233, 1972.
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© 1986 Springer-Verlag Berlin Heidelberg
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Brenkman, C.J., Rutten, W.L.C., Grote, J.J. (1986). Middle Ear Research Using a Squid Magnetometer. II. Transfer Characteristics of Human Middle Ears. In: Allen, J.B., Hall, J.L., Hubbard, A.E., Neely, S.T., Tubis, A. (eds) Peripheral Auditory Mechanisms. Lecture Notes in Biomathematics, vol 64. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-50038-1_8
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DOI: https://doi.org/10.1007/978-3-642-50038-1_8
Publisher Name: Springer, Berlin, Heidelberg
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