[Eeglablist] emotiv in eeglab

[Tom Campbell]

Sure, the Emotiv's srate is 128 Hz (Nyquist 64Hz), so you won't be getting ABRs out of that. Looking in the header there is no information about prefiltering. What the recording bandwidth really is remains obscure, but the spec says '0.2 - 45Hz, digital notch filters at 50Hz and 60Hz'. The bulk of the recorded power is in the frequency range less than 20 Hz, which is what some reports in literature are reporting as a lowpass. Some have strong views about having a recording bandwidth up to 100Hz at least when measuring long latency responses, but I'm not sure if I completely understand that perspective.Date: Wed, 20 Jun 2012 23:12:04 -0400
From: bhikshuni.lozang at insightdeliverysystems.com
To: eeglablist at sccn.ucsd.edu
Subject: Re: [Eeglablist] emotiv in eeglab


  
    
  
  
    On 6/19/2012 3:00 PM,
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      Today's Topics:

   1. Re: 0.01 high pass filter (Clemens Brunner)
   2. Re: Does EEGLAB work with EMOTIV systems (Scott Makeig)
   3. Re: choice of reference (Joseph Dien)

      

      
      

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    Last time I looked the main issue with Emotiv was low resolution
    (128 samples per second?), so maybe difficult to clear Nyquist
    frequency. But you are supposed to be able to output the raw signal
    data files if you get the developer version.

    

    It is way more expensive but I opted for Nexus-10 from MindMedia but
    it only has 4 channels of EEG (but up to 2056 sps resolution) but
    also has 6 channels of biodata channels. It is not wireless at the
    head however (but has bluetooth to computer).

    

    Good luck!

    

    -- 

      Bhikshuni Lozang Trinlae, B.Sc., Ed.M.; CEO

      bhikshuni.insightdeliverysystems.com

      Doctoral student in practical theology

      Center for
        Engaged Compassion

    
  


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