Definition - What does Anahata Nada mean?
Anahata nada is the name given in yogic philosophy to the cosmic sound or the so-called “white noise” that is present everywhere, without being actively made in a way that can be perceived. From Sanskrit, anahata means "un-struck" or "unbeaten," and nada means "to flow."
Sometimes, this sound is also known as the “unmade sound.” This concept is sometimes linked to the famous Zen question, “What is the sound of one hand clapping?” The idea is that anahata nada is this sound, because it is omnipresent and is all-pervasive, even when nothing is happening to create any other sound.
Yogapedia explains Anahata Nada
Some say that anahata nada, or the sound of silence, is perfection. According to yogic teachings, this sound is necessary for all other sound to exist because it is the canvas upon which other sounds are manifest.
In yoga, it is taught that the sound of anahata nada can be represented as Aum or Om, the sacred syllable and revered bija mantra. This is the sound from which the whole universe emanated and represents the fundamental oneness of all creation.
In Kundalini yoga, it is said that the goddess of kundalini shakti embodies anahata nada. She is portrayed as a serene goddess, centered on her selfless spiritual devotion. Her energy, and that of anahata nada, is upward moving.