The physical body is ensheathed by an auric field in which seven major chakras (invisible to the naked eye) are present. The seven chakras are Sahasrāra, Ājñā, Viśuddha, Anāhata, Manipūra, Svādhiṣṭhāna and Mūlādhāra.
Each chakra is associated with an endocrine gland and controls specific organs. Each svara resonates with one major chakra. When each note is sung, concentrating on the Śruti, the vibration of the corresponding chakra can be experienced.