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Durée de plateau du réflexe acoustique en fonction des paramètres de la stimulation acoustique

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Using the processing methods described in a previous study, the plateau duration of the acoustic reflex was measured for a group of 20 normal subjects. The reflex was triggered by acoustic stimulations with the following characteristics: trapezoidal envelope, short [1 s] or long [10 s] plateau duration, and variable spectral content (500 Hz, 4000 Hz or white noise). The main effect arose from the influence of the stimulus spectrum. For long stimulations containing high frequencies, and for some of the patients, a reflex adaptation, or decay, appears, so that the plateau duration of the reflex is much shorter than the stimulus duration.

Zusammenfassung

Ausgehend von einer früheren, in [5] publizierten Untersuchung, wurde die Dauer des Plateaus des akustischen Reflexes an einer Gruppe von 20 normalen Versuchspersonen gemessen. Der Reflex wurde durch Schallsignale mit einer trapezartigen Einhüllenden (mit kurzem [1 s] oder langem [10 s] Plateau und veränderlichem kontinuierlichem Spektrum (500 Hz, 4000 Hz oder weißes Rauschen) ausgelost. Der letztere Parameter spielte die wichtigste Rolle, da bestimmte Versuchspersonen bei Iangen Anregungen mit hohen Frequenzen eine Adaptation ihres Reflexes in Form einer Verkürzung des Plateaus zeigten.

Sommaire

A partir du protocole d'étude défini dans un précédent article [5], la durée de plateau du réflexe acoustique a été mesurée pour un groupe de 20 sujets normaux. Le réflexe était déclenché par des stimulations sonores d'enveloppe trapézoïdale (de durée de plateau courte [1 s] ou longue [10 s]), et de contenu spectral variable [500 Hz, 4000 Hz ou bruit blanc]. Ce dernier paramètre joue le rôle le plus important car, pour des stimulations longues contenant des hautes fréquences, certains sujets présentent une adaptation de leur réflexe, engendrant une réduction de la durée de son plateau.
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Document Type: Research Article

Publication date: 01 December 1988

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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