To sum up, it depends on how your device is powered, and if there is a source of electrical activity, it will alter the EEG and you can detect it, although, you might not be able to say on which frequency exactly is working on (is it Bluetooth, wifi, RF, etc. ?).
What is EEG wave analysis?
An EEG is a test that detects abnormalities in your brain waves, or in the electrical activity of your brain. During the procedure, electrodes consisting of small metal discs with thin wires are pasted onto your scalp. The electrodes detect tiny electrical charges that result from the activity of your brain cells.
What does the EEG signal represent?
The electroencephalogram (EEG) is a recording of the electrical activity of the brain from the scalp. The recorded waveforms reflect the cortical electrical activity.
What can an EEG detect?
An electroencephalogram (EEG) is a noninvasive test that records electrical patterns in your brain. The test is used to help diagnose conditions such as seizures, epilepsy, head injuries, dizziness, headaches, brain tumors and sleeping problems. It can also be used to confirm brain death.