The baseline noise reflects the stability of the skin-electrode interface and can be assessed by recording the electrical signal from the relaxed muscle.
Although baseline noise cannot be completely eliminated, it can be reduced by effective preparation of the skin.
For routine applications:
- Shave excessive hair, if necessary, to ensure a secure skin-electrode contact.
- Wipe the skin with an alcohol swab to remove oil and debris at the site chosen for sensor application.
For more extreme conditions, such as in persons with dry skin, additional preparatory steps should be executed:
- Remove the surface layer of dead skin by light abrasion of the skin, i.e. repeatedly apply and peel off hypoallergenic tape.
- If the skin is too dry, moisten the skin with a mild solution of soap and water and wipe dry.