Nada Anusandhana

Nada Anusandhana (नाद अनुसन्धान) is a meditation practice of inner sound awareness in which the practitioner listens for and follows the subtle internal sounds (nada) that arise within the body. It is one of the most advanced practices in Yoga and is the culmination of nada yoga.

Overview

Nada Anusandhana literally means “investigation of sound” and refers to the practice of listening for the subtle sounds that arise spontaneously within the body during deep meditation. The practice is described in the Hatha Yoga Pradipika (Chapter 4) and the Yoga Kundalini Upanishad as the highest form of meditation. The sounds are said to arise from the collision of prana with the sushumna nadi and are classified into various categories: external sounds (like drums, bells, and conches) and internal sounds (like the humming of bees, the singing of crickets, and ultimately the sound of silence).

Method

The practitioner sits in a meditative posture and, after withdrawing the senses through pratyahara (often using yoni mudra or Shanmukhi Mudra), turns attention inward to listen for the nada (internal sound). The practitioner first perceives external sounds (drums, bells, etc.), then subtler sounds (humming, buzzing), and ultimately the sound of silence (anahata nada). The practitioner follows the sound without analysis or interpretation, allowing awareness to merge with the sound itself. The practice is typically performed for 30-60 minutes.

Benefits and Purpose

Traditional texts claim Nada Anusandhana:

• Leads to the state of samadhi
• Awakens kundalini shakti
• Purifies the mind and removes mental impurities
• Leads to the experience of the divine sound
• Is the highest form of meditation

Verification Notes

• Described in the Hatha Yoga Pradipika (4.65-4.75).
• The Yoga Kundalini Upanishad describes nada anusandhana as the highest practice.
• Audited against Wikipedia (September 2026).