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Sounds Emitted by Biological Sources and the Functional Characteristics of Central Auditory Neurons

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The purpose of this article is to focus attention to the general relations between bioacoustical sound emission from animal and man and the sound analyzing properties of the auditory system.

One problem of particular interest is the decoding of temporal sound characteristics. Response measurements from central auditory neurons in the colliculus inferior region of white rats reveal selectivity to both carrier frequency and rate of amplitude modulation. Optimal pulse rates were of the order of 10 to 30, maximally 100 per second. The rate of envelope variation as the limiting factor in reproduction of a triangular modulation waveform is demonstrated. The general conclusion is that central auditory units are specifically suited for detection of sound envelope characteristics and pulse sequences. The interplay of inhibitory and excitatory influences is found not only in spatial organization (lateral inhibition) but also in time (preexcitatory and post-excitatory inhibition).
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Document Type: Research Article

Publication date: December 1, 1974

More about this publication?
  • 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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