Definicija: pove, koliko energije sprejme telo ob izpostavljenosti elektromagnetnim sevanjem. Meri se v vatih na kilogram telesne teže (W/kg)

Definicija: a measure of the rate at which energy is absorbed by the human body when exposed to a radio frequency (RF) electromagnetic field; although, it can also refer to absorption of other forms of energy by tissue, including ultrasound