The number of bits is important in being able to accurately estimate the voltage, but more bits doesn’t necessarily mean better quality data. Simply put, the Analog to Digital Converter (ADC) Bits is the resolution of the signal. This EEG tutorials has some more details on the sampling rate ADC Bits: Depending on the frequency you are interested in studying, your sampling rate needs to be at least 2.5 times greater. Most devices will have a minimum of 256 samples a second, but you can find some which have a higher sampling rate. The Sampling Rate of an EEG is the number of sample a second you can get from your device. You would be better off with an OpenBCI so that you can place the electrodes where you want. If you want to measure Motor Imagery with the Muse, you won’t have much success. In most eeg papers, they will state where on the brain the strong response came from.Īlso, many consumer EEG’s have electrodes which are rigid and can’t be moved. Measuring Relaxation levels is easy with 1 or 2 electrodes but measuring other brain activity can be difficult. Number and Placement of Electrodes:ĭepending on the type of brain response you want to measure, your system may need a minimum number of electrodes.
When deciding which EEG headset to purchase, there are a few features you should look at when making your decision.
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