Successful neurofeedback builds on a good EEG signal. Using a distorted EEG signal is like trying to listen to a piece of music in the middle of a construction site. One importand condition for a good EEG signal is good contacts of the EEG electrodes to the head. An impedance meter helps to achieve such good contacts. It is important that usage of the impedance meter is easy and fits in the process in a seamless way.

 In addition, worn-out electrodes tend to produce high, noisy galvanic voltages that may reduce the quality of the EEG signal dramatically. Therefore, the impedance meter of the EEG NeuroAmp has a built-in galvanic voltage measurement feature that warns in case of improper electrode configuration.