Ein elektrischer Kettenleiter zur Untersuchung der mechanischen Schwingungsvorgänge im Innenohr
Vibrations of the inner ear and especially of the basilar membrane are described with the help of a simplified model. Three-dimensional differential equations for pressure and particle velocity of the liquid in the spira l ducts are formulated together with suitable boundary conditions. Since only the pressure exerted on the basilar membrane and the distortions of the latter are of interest, the three-dimensional differential equations may be reduced to one-dimensional differential equations. The only variable is now the position on the axis of the spiral ducts. The vibration of the liquid normal to the axis of the spiral duct exerts forces on the basilar membrane, which may be included in the one-dimensional differential equations, since these oscillations are approximately in phase with the vibrations of the basilar membrane. The one-dimensional equations are solved with the help of an electric chain network consisting of 65 elements. Measuring results obtained with such networks are compared with results obtained from measurements in the human ear. The distortions of the basilar membrane are measured by exciting with a pressure impulse and the velocity of the travelling wave over the basilar membrane is found. Lastly the distortions of the basila r membrane are also studied for excitation not from the oval window but from another artificial opening, as used in modern surgery.
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Document Type: Research Article
Publication date: January 1, 1961
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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