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Original Article

Frequency Dependence of the Binaural Interaction Component of the Auditory Brainstem Response

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Pages 420-429 | Received 05 Feb 1985, Accepted 07 Jun 1985, Published online: 07 Jul 2009
 

Abstract

The frequency dependence of the binaural interaction component of the auditory brainstem response was examined. Subjects included 24 with normal hearing and 5 with severe high-frequency losses. Tone pips of 100 and 80 dB pe SPL at 1 000 and 4 000 Hz were presented monaurally and binaurally. The binaural interaction component was derived by subtracting the binaural response from the addition of the left and right monaural responses. The binaural interaction component was produced by both 1 000 and 4 000 Hz, although it was larger and more reliable with 1 000 Hz. The absence of responses to 4 000 Hz in cochlear-impaired subjects did not alter appreciably the morphology of the binaural interaction component to 1 000 Hz. The correspondence between the binaural interaction component and the masking level difference was not good.

Le röle de la fréquence dans la composante d'interaction binaurale des potentiels évoqués auditifsdu tronc cérébral a été examiné. Vingt-quatre sujets normoentendants et 5 sujets avec seuiis d'audition élevés aux hautes fréquences ont participé à l'étude. Des salves tonales de 100 et 80 dB pe SPL aux fréquences de 1 000 et 4 000 Hz ont été présentées monauralement et binauralement. L'interaction binaurale a été déterminée en soustrayant la réponse binaurale de la somme des réponses monaurales. Une interaction binaurale a été trouvée avec la stimulation à 1 000 et à 4 000 Hz bien que la réponse à 1 000 Hz soit plus prononcée. L'absence de réponse à 4 000 Hz chez les sujets avec pathologie cochléaire n'a pas modifié de façon appréciable la morphologie de l'interaction binaurale à 1 000 Hz. Une correspondance entre l'interaction binaurale et la différence de niveau de masquage n'a pas été établie.

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