On the mechanics of the horseshoe bat cochlea

H. Duifhuis; M. Vater

doi:10.1007/978-3-642-50038-1_12

On the mechanics of the horseshoe bat cochlea

H. Duifhuis, M. Vater

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

The basilar membrane (BM) in the greater horseshoe bat has a peculiar thickness and width profile, which suggests that BM-stiffness in the basal half turn is more than one order of magnitude greater than in the second half turn and more apically. The transition is quite abrupt.

Motivated by new data on the cochlear frequency map we analyse the possibility that the stiffer basal half turn acts as an acoustic interference filter. Its increased stiffness and impedance transitions at the stapes and at the transition mentioned, make this a feasible mechanism. We propose that 2¼ wavelengths of the reflected call frequency of the echolocating bat match the length of the interference filter. Using a scaled version of the middle ear description given by Matthews (1980) and linear, passive, long-wave, 1-dimensional cochlear mechanics we analyse the effect of the interference filter and compute the tympanic membrane input impedance. Experimental data on the latter (Wilson and Bruns, 1983a) are interpreted in terms of the proposed mechanism: fine structure in the input impedance appears to reflect the interference filter passbands.

Original language	English
Title of host publication	Peripheral auditory mechanisms : proceedings of a conference held at Boston University, Boston, MA, August 13-16, 1985
Editors	J.B. Allen, J.L. Hall, A. Hubbard, S.T. Neely, A. Tubis
Place of Publication	Berlin
Publisher	Springer
Pages	89-96
ISBN (Print)	0387160957, 3540160957
DOIs	https://doi.org/10.1007/978-3-642-50038-1_12
Publication status	Published - 1986
Event	Conference on Peripheral auditory mechanisms - Boston University, Boston, United States Duration: 13 Aug 1985 → 16 Aug 1985

Publication series

Name	Lecture notes in biomathematics
Publisher	Springer
Volume	64

Conference

Conference	Conference on Peripheral auditory mechanisms
Country/Territory	United States
City	Boston
Period	13/08/85 → 16/08/85

Access to Document

10.1007/978-3-642-50038-1_12

Cite this

Duifhuis, H., & Vater, M. (1986). On the mechanics of the horseshoe bat cochlea. In J. B. Allen, J. L. Hall, A. Hubbard, S. T. Neely, & A. Tubis (Eds.), Peripheral auditory mechanisms : proceedings of a conference held at Boston University, Boston, MA, August 13-16, 1985 (pp. 89-96). (Lecture notes in biomathematics; Vol. 64). Springer. https://doi.org/10.1007/978-3-642-50038-1_12

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title = "On the mechanics of the horseshoe bat cochlea",

abstract = "The basilar membrane (BM) in the greater horseshoe bat has a peculiar thickness and width profile, which suggests that BM-stiffness in the basal half turn is more than one order of magnitude greater than in the second half turn and more apically. The transition is quite abrupt.Motivated by new data on the cochlear frequency map we analyse the possibility that the stiffer basal half turn acts as an acoustic interference filter. Its increased stiffness and impedance transitions at the stapes and at the transition mentioned, make this a feasible mechanism. We propose that 2¼ wavelengths of the reflected call frequency of the echolocating bat match the length of the interference filter. Using a scaled version of the middle ear description given by Matthews (1980) and linear, passive, long-wave, 1-dimensional cochlear mechanics we analyse the effect of the interference filter and compute the tympanic membrane input impedance. Experimental data on the latter (Wilson and Bruns, 1983a) are interpreted in terms of the proposed mechanism: fine structure in the input impedance appears to reflect the interference filter passbands.",

author = "H. Duifhuis and M. Vater",

year = "1986",

doi = "10.1007/978-3-642-50038-1_12",

language = "English",

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series = "Lecture notes in biomathematics",

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pages = "89--96",

editor = "J.B. Allen and J.L. Hall and A. Hubbard and S.T. Neely and A. Tubis",

booktitle = "Peripheral auditory mechanisms : proceedings of a conference held at Boston University, Boston, MA, August 13-16, 1985",

address = "Germany",

note = "Conference on Peripheral auditory mechanisms ; Conference date: 13-08-1985 Through 16-08-1985",

}

Duifhuis, H & Vater, M 1986, On the mechanics of the horseshoe bat cochlea. in JB Allen, JL Hall, A Hubbard, ST Neely & A Tubis (eds), Peripheral auditory mechanisms : proceedings of a conference held at Boston University, Boston, MA, August 13-16, 1985. Lecture notes in biomathematics, vol. 64, Springer, Berlin, pp. 89-96, Conference on Peripheral auditory mechanisms, Boston, Massachusetts, United States, 13/08/85. https://doi.org/10.1007/978-3-642-50038-1_12

On the mechanics of the horseshoe bat cochlea. / Duifhuis, H.; Vater, M.
Peripheral auditory mechanisms : proceedings of a conference held at Boston University, Boston, MA, August 13-16, 1985. ed. / J.B. Allen; J.L. Hall; A. Hubbard; S.T. Neely; A. Tubis. Berlin: Springer, 1986. p. 89-96 (Lecture notes in biomathematics; Vol. 64).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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N2 - The basilar membrane (BM) in the greater horseshoe bat has a peculiar thickness and width profile, which suggests that BM-stiffness in the basal half turn is more than one order of magnitude greater than in the second half turn and more apically. The transition is quite abrupt.Motivated by new data on the cochlear frequency map we analyse the possibility that the stiffer basal half turn acts as an acoustic interference filter. Its increased stiffness and impedance transitions at the stapes and at the transition mentioned, make this a feasible mechanism. We propose that 2¼ wavelengths of the reflected call frequency of the echolocating bat match the length of the interference filter. Using a scaled version of the middle ear description given by Matthews (1980) and linear, passive, long-wave, 1-dimensional cochlear mechanics we analyse the effect of the interference filter and compute the tympanic membrane input impedance. Experimental data on the latter (Wilson and Bruns, 1983a) are interpreted in terms of the proposed mechanism: fine structure in the input impedance appears to reflect the interference filter passbands.

AB - The basilar membrane (BM) in the greater horseshoe bat has a peculiar thickness and width profile, which suggests that BM-stiffness in the basal half turn is more than one order of magnitude greater than in the second half turn and more apically. The transition is quite abrupt.Motivated by new data on the cochlear frequency map we analyse the possibility that the stiffer basal half turn acts as an acoustic interference filter. Its increased stiffness and impedance transitions at the stapes and at the transition mentioned, make this a feasible mechanism. We propose that 2¼ wavelengths of the reflected call frequency of the echolocating bat match the length of the interference filter. Using a scaled version of the middle ear description given by Matthews (1980) and linear, passive, long-wave, 1-dimensional cochlear mechanics we analyse the effect of the interference filter and compute the tympanic membrane input impedance. Experimental data on the latter (Wilson and Bruns, 1983a) are interpreted in terms of the proposed mechanism: fine structure in the input impedance appears to reflect the interference filter passbands.

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ER -

On the mechanics of the horseshoe bat cochlea

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