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Emotiv EPOC

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Epoc ign 2008
Picture of the EPOC during GDC 2008
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The EPOC is a 14-channel wireless EEG system developed by Emotiv Systems and is currently their only hardware product. The product is currently available for order via their website for developers (shipping within 3 months) and consumers.

Specifications[1]

Emotiv elec layout
Electrode locations used by the EPOC
M86Added by M86
Number of channels 14 (plus CMS/DRL references)
Channel names (Int. 10-20 locations) AF3, AF4, F3, F4, F7, F8, FC5, FC6, P3 (CMS), P4 (DRL), P7, P8, T7, T8, O1, O2
Sampling method Sequential sampling, Single ADC
Sampling rate ~128Hz (2048Hz internal)
Resolution 16 bits (14 bits effective) 1 LSB = 0.51μV
Bandwidth 0.2 - 45Hz, digital notch filters at 50Hz and 60Hz
Dynamic range (input referred) 256mVpp
Coupling mode AC coupled
Connectivity Proprietary wireless, 2.4GHz band
Battery type Li-poly
Battery life (typical) 12 hrs
Impedence measurement Contact quality using patented system

What's in the box

  • Emotiv EPOC neuroheadset (FCC ID: XUE-EPOC01)
  • USB wireless receiver dongle (FCC ID: XUE-USBD01)
  • Hydrator w/ 16 saline sensors inside (note: not all batches have included the hydrator and have instead had the sensors already attached to the headset)
  • AC Adapter to USB (mini-B) power adapter or USB cable
  • Bottle(s) of saline solution
  • CD containing a copy of the ordered SDK or software sets

Hardware

Power

The USB port included on the headset is strictly for charging use. Attempting to extend battery life by connecting power to the device while on will cause the device to enter standby mode. While charging, the charging LED will be RED. After the headset has fully charged the charging led will turn GREEN.

Electrodes

The EPOC electrodes are modular allowing for easy replacement for alternative or replacement sensor modules. While the device is set to initially start shipping with only saline sensor modules, dry sensor modules are expected to be available at some point.[2]

Making your own saline solution

see Making your own saline solution, probably should be worked into a saline sensor specific section rather than a 'making your own saline solution section'

Reference Electrodes

Reference electrodes are located at P3[3] (CMS) and P4[3] (DRL) or at alternative locations behind the ear.

Hardware encryption

All incoming data from the headset is encrypted and must be first decrypted by edk.dll or another Emotiv application[4]. Additionally, the premium version of edk.dll issued to SDKs with raw data access will be license limited to disallow raw data output as an output of edk.dll using programs[4].

Differences between SDK and Consumer headsets[5]

In most details the two will be physically identical. There will be a firmware difference between the SDK version and the Consumer version and some minor labeling differences. The SDK version will work will all applications, while the Consumer version will be locked out of all but statically compiled (and therefore pre-screened) applications.

Software

Control Panel

EmoKey

SDK only

For SDK in linux you must download the attachment file in the oficial page, step by step is: www.emotiv.com->login->MY EMOTIV-> MY DOWNLOADS -> Research Edition - Linux// this downloaded a .sh file, exeute this file an start the SDK

EmoComposer

TestBench

Allows viewing and saving of raw EEG streams from compatible headsets. Files saved from TestBench are EDF files. A few example output files from the software can be downloaded here.

Detection suites / API

Expressiv

Affectiv

Cognitiv

Third-party

see Third-party applications

References

  1. Emotiv Research Plus SDK Headset Specifications, http://www.emotiv.com/ResearchPlus.html
  2. Emotiv Forum, gmac, http://emotiv.com/forum/viewtopic.php?f=9&t=112&p=805
  3. 3.0 3.1 Emotiv Forum, gmac, http://emotiv.com/forum/viewtopic.php?f=5&t=2945
  4. 4.0 4.1 Emotiv Forum, gmac, http://emotiv.com/forum/viewtopic.php?f=9&t=185&start=30
  5. Emotiv Forum, gmac, http://emotiv.com/forum/viewtopic.php?f=5&t=293&p=2023

External Links

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