Neurofeedback is a technique that helps people learn how to regulate their brain function. This process involves monitoring brainwaves, which are signals in the brain. Brainwaves can be measured using a device called an EEG. The EEG records the different types of brainwaves, such as alpha, β, θ, and δ https://s3.us-west-1.amazonaws.com/neurofeedback-therapy-equipment/biofeedback-relaxation-aids.html