Výsledky vyhledávání - "Baumgart, Johannes"

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A Transfer Matrix for the Input Impedance of weakly tapered Cones as of Wind Instruments

Autor: Grothe, Timo, Baumgart, Johannes, Nederveen, Cornelis J.

Publikováno v: J. Acoust. Soc. Am. 154, 463-466 (2023)

A formula for the local acoustical admittance in a conical waveguide with viscous and thermal losses given by Nederveen [(1969) Acoustical Aspects of Woodwind Instruments (Frits Knuf, Amsterdam)] is rewritten as an impedance transmission matrix. Base

Externí odkaz: http://arxiv.org/abs/2303.12750

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Infrasound of a Wind Turbine Reanalyzed as Power Spectrum and Power Spectral Density

Autor: Baumgart, Johannes, Fritzsche, Christoph, Marburg, Steffen

The infrasound levels due to the blade-tower interaction generated by a wind turbine in the publication by Pilger and Ceranna (JSV, Vol. 388, pp. 188-200, 2017) have to be corrected to be interpreted as sound pressure level. Also, the electrical powe

Externí odkaz: http://arxiv.org/abs/2102.01401

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Dissertation/ Thesis

The Hair Bundle: Fluid-Structure Interaction in the Inner Ear

Autor: Baumgart, Johannes

A multitude of processes cooperate to produce the sensation of sound. The key initial step, the transformation from mechanical motion into an electrical signal, takes place in highly specialized mechanosensitive organelles that are called hair bundle

Externí odkaz: https://tud.qucosa.de/id/qucosa%3A25462
https://tud.qucosa.de/api/qucosa%3A25462/attachment/ATT-0/

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Damping Properties of the Hair Bundle

Autor: Baumgart, Johannes, Kozlov, Andrei S., Risler, Thomas, Hudspeth, A. James

Publikováno v: AIP Conf. Proc. 1403, 17 (2011)

The viscous liquid surrounding a hair bundle dissipates energy and dampens oscillations, which poses a fundamental physical challenge to the high sensitivity and sharp frequency selectivity of hearing. To identify the mechanical forces at play, we co

Externí odkaz: http://arxiv.org/abs/1505.03705

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Forces between clustered stereocilia minimize friction in the ear on a subnanometre scale

Autor: Kozlov, Andrei S., Baumgart, Johannes, Risler, Thomas, Versteegh, Corstiaen P. C., Hudspeth, A. J.

Publikováno v: Nature 474, 376-379 (2011)

The detection of sound begins when energy derived from acoustic stimuli deflects the hair bundles atop hair cells. As hair bundles move, the viscous friction between stereocilia and the surrounding liquid poses a fundamental challenge to the ear's hi

Externí odkaz: http://arxiv.org/abs/1201.0739

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