[Eeglablist] ABR Latency - Headphones

[Herbert J Gould (hgould)]

ABR stimuli is typically a 100 microsecond electrical square wave presented through Entymotic ER 3a earphones.  The earphone has a polyurethane tube to create a time delay of .8 msec between the onset of the square wave and the arrival of the sound at the ear.  This avoids the stimulus artifact that you obtain with earphones that are directly covering the ear.    This combination will result in a acoustic click centered in the 2 to 4  kHz region arriving at the cochlea once earphone, ear canal and middle ear resonance is taken into account.   You can obtain the ER 3a with several different ohm ratings so be sure to match it to your equipment.



Herbert Jay Gould, Ph.D.
Associate Professor
[Description: UofM logo]

The University of Memphis School of Communication Sciences and Disorders
4055 N. Park Loop
Memphis, TN 38152

901.678.5837 | memphis.edu/csd<http://memphis.edu/csd>


Hgould at Memphis.edu<mailto:Hgould at Memphis.edu>

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From: eeglablist-bounces at sccn.ucsd.edu [mailto:eeglablist-bounces at sccn.ucsd.edu] On Behalf Of Christian Fonseca
Sent: Tuesday, July 05, 2016 4:33 PM
To: eeglablist at sccn.ucsd.edu
Subject: [Eeglablist] ABR Latency - Headphones

Hi!

I'm trying to do a program to acquire data for ABR latencies, but I don't know which headphones can I use. Now, I'm using gamer headphones, but I saw that in hospitals uses another type of headphones with sound insulation into the plastic earpad (Which brand are those headphones?)

Thanks for your answers,

Regards,

Christian Fonseca
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