That form of yoga in which the yogi listens to sounds that
can be heard within his own body when the ears are closed.
These sounds, termed Nada, are of various kinds, ranging from
the roar of the ocean to the humming of bees. Variations on
laya yoga have become central to the Radhasoami groups in the
Pubjab and to its North American derivatives such as the Diving
Life Mission (now Elan Vital) and ECKANKAR.