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Re: EEG compatible earphones
We use Etymotic ER2s or ER3s. The drivers are attached to the eartips by tubes, so stimulus artifact is reduced, but it is still a good idea to wrap the drivers with insulating tape to reduce electrical noise and be sure to position the drivers as far as possible from the recording site. ER2s have a flatter frequency response but achieve this with a higher impedance and thus I believe require more voltage. ER3s are able to achieve higher overall levels and may be more resistant to artifact. We are in the middle of confirming some of these details, but I'm pretty confident that the Etymotic inserts are the way to go, however it turns out. As indicated on the Etymotic website, there are special version with the insulation included, etc., available from ABR hardware providers such as IHS. We have a pair of those as well.
http://www.etymotic.com/pro/
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Frederick (Erick) Gallun, PhD
Research Investigator, National Center for Rehabilitative Auditory Research
Portland VA Medical Center
Associate Professor, Dept. of Otolaryngology and Neuroscience Graduate Program
Oregon Health & Science University
-----Original Message-----
From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Michael Tangermann
Sent: Friday, December 13, 2013 2:09 AM
To: AUDITORY@xxxxxxxxxxxxxxx
Subject: Re: EEG compatible earphones
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Dear Maris,
I like to use the Sennheiser PMX 200 model, a closed-back neckholder shape.
It is great for EEG recordings, but unfortunately it is not available on the market any more. If you find a source, however, please let me know :-)
Best,
Michael
On 12/12/2013 05:28 PM, Maris Skujevskis wrote:
> Hi all,
>
> Can anyone suggest a pair of EEG compatible earphones?
>
> I am thinking of something that is: a) physically comfortable and not
> in touch with the electrodes (i.e., earphones rather than headphones)
> b) not introducing any electrical noise into the EEG recording c)
> noise isolating
>
>
> Thanks.
>
- --
!!! NEUE ADRESSE:
Michael Tangermann
Breite Str. 10
79183 Waldkirch
Mob: +49.(0)163.7352468
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