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The index and ring fingers have three holes in both ears. If you do this constantly, you will discover the inner sound of Nada. "" Gheranda Samhita "(1.33)
Sit in a seven-member pose. With your index fingers in your ear holes, slowly massage them clockwise and counterclockwise.
Karna-dhauti stimulates the circulation of udana-vayu around the ears and head, and the sounds of nada become audible. Takes 3 minutes