How a Yogi Hears the Internal Sound: Exploring the Subtle Auditory Realm In the ancient yogic tradition, one of the most profound practices is śabda-śravana—listening to the inner sound, also known as nāda (the primordial vibration). As described in classical texts and preserved in oral lineages, a seasoned yogi, seated firmly in siddhāsana and adopting vaiśṇavī-mudrā , is able to progressively still the external senses and “hear” a subtle, internal resonance. Below, we delve into the technique, its deeper significance, benefits for modern practitioners, and the intriguing scientific insights that illuminate this mystical experience. 1. The Posture: Siddhāsana Siddhāsana, often called the “perfect pose,” brings stability to both body and mind. Legs : One heel presses the perineum, the other foot rests above the first calf muscle. Spine : Erect, yet relaxed; the natural curves preserved. Hands : Inḥand posture or resting on knees in chin mudrā. By anchoring the pe...