fbpx
How Can We Help?
< Back
You are here:
Print

Why Does Emotiv EPOC+ Stop At 43 Hz In Range? Is There A Way To Expand This Somehow?

Our firmware applies a strong double notch filter at 50Hz and 60Hz to remove interference from the electrical power supply in most countries.  The filter affects frequencies down to about 45Hz, so we specify 43Hz as the upper usable frequency limit where the spectral response is perfectly flat. The filters extend to about 66Hz, which is higher than the Nyquist cut-off frequency for 128Hz sample frequency. Our firmware also filters frequencies above about 85Hz in order to eliminate potential interference from harmonics of the electrical mains (100, 120, 150, 180Hz etc). Increasing the frequency response above 43Hz is not currently available.

Previous Are CMS/DRL References Positioned As Usually Around The Mastoid? Are P3 And P4 Signals Estimated From Data Of Existing (Closest) Derivations?
Next Why does the contact map show activity when the headset is not on my head?
Table of Contents

Temporary down for maintenance.

Please check back soon.