Even if you do not feel any physical sensation from the disc, rest assured that your body passes the signal from the disc to your brain. The extent to which the disc has an effect on your body depends on your unique physiology on a given day - the effect you feel from the disc may be more obvious or completely non-apparent. On days where you are more depleted of GABA, your body may take more from the disc and therefore notice more. However, even if you don't feel anything at all, the disc is working, and it will be upregulating GABA and priming your brain to respond to the NuCalm neuro acoustic software. The disc + eye mask + software will produce a synergistic effect.