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The Effects of Hair Cell Breakdown upon the Microphone Potential at the Round Window (RMP) of the Guinea Pig

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The usefulness of the microphone potential at the round window (RMP) of the guinea pig cochlea for the determination of hair cell damages is being doubted in all countries. Its methodological advantages, however, permit extremely rational test series, e.g. for testing the sound overload behavior of the ear. It is indispensable, therefore, to take a decision on the diagnostic value of the RMP.

Therefore, numerical RMP impairment frequency responses after pure tone overloads are compared with those determined with animal experiments. The basis of the calculations is the model we proposed at an earlier date pertaining to the frequency-dependent generation of the RMP [6], which is now being stepwise extended to the condition of the Corti organ after sound overload. It is supposed that the overloaded sensory cell fails as a generator of the stimulation induced current and that its internal resistance diminishes considerably. The model submitted herewith can be regarded true to the figure, according to several criteria. Finally, “critical puretone load-thresholds” for the guinea pig are indicated.
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Document Type: Research Article

Publication date: October 1, 1975

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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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