Actually you may have just demonstrated proof, as to why the NeuroSync ear canal placed device is a superior design. When compared to the head band sensor configuration that their competitors are using, the NeuroSync units sensors are closer to the receiving hardware. There are basically two factors that diminish signal quality, they are signal degradation due to impedance (STRENGTH) and external radio interference (CLARITY). The length of the wires that connect the sensors to the hardware directly effects, both of these factors. The longer the wire the weaker the signal strength the greater the radio interference. The shorter the wires the greater the signal strength and the weaker the radio interference. The effects of impedance and interference combine and have an exponential relationship on signal quality.
Even though impedance and interference are multipliers that combine to effect signal quality. I'm only going to focus on external radio interference. Think of a wire as a radio antenna the longer the wire the more effective it will be in receiving radio signals. The farthest sensors on the headband type of BCI are approximately 10 inches from microprocessor compared to less than an inch for the NeuroSync unit. This equates to a 10X difference in antenna lengths, the longer antenna greatly contributes to radio interference or reduced clarity.
Think of it like this you live right under a 50,000 watt radio stations transmission tower that is broadcasting at a frequency of 1000kHz and here you are trying to tune into 1010kHz on your home made 10 watt transmitter. It goes to reason that you will encounter great difficulty obtaining a strong signal from your setup, due to being so close to the much more powerful 50,000 watt 1000kHz transmitter. The closer you place your receiver to the transmitter the better signal you could expect.
This is the dauntingly difficult task that BCI software algorithms must accomplish. The software must differentiate between the much stronger interference signals from the much weaker EEG signals. Again this combined with the diminishing signal strength which is related to length of the wire that the signal must travel.
Your experiment demonstrated that interference is directly related to increased wire length(ANTENNA). The shorter wire length(ANTENNA) of the NeuroSync unit effectively reduces the interference from 7 on the scale to 0. This combined with a stronger signal allows the software to be many times more effective in responding to your actual EEG signals. The software is designed to differentiate between outside interference and your brains actual EEG signals. Without the unit being in place, the software would not be able to make this comparison and function as it was designed to do.
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