Acoustics is the branch of physics concerned with the study of sound (mechanical waves in gases, liquids, and solids). A scientist who works in the field of acoustics is an acoustician. Acoustics is the science concerned with the production, control, transmission, reception, and effects of sound.
Sound bath is an ancient sound-healing practice whereby the yogi relaxes in a reclining position – often supported in savasana (corpse pose) – and allows the healing sounds of traditional musical performances to bath over him/her. The music is typically generated by such instruments and methods as singing bowls, gongs, drumming, tuning forks and chanting.
Sound bath is an ancient practice dating back more than 2,000 years with roots in Tibet. It has recently gained popularity in the West as a relaxation technique in conjunction with yoga and meditation.
In Hinduism and yogic philosophy, para nada is the highest of the four levels of sound in the universe. The term comes from the Sanskrit, para, meaning “highest,” “ultimate” or “supreme”; and nada, meaning “sound” or “tone.”
Para nada is transcendental sound that is beyond hearing or the mind’s understanding and is infinite. Associated with the cosmic vibration of Om, para nada is heard only when the yogi is in a state of higher consciousness, just before experiencing samadhi, the final limb of yoga.
While the Upanishads say that para nada is manifested in Om, it is a silent Om. According to some Hindu texts, para nada has no vibration, movement or frequency but is a sound only enlightened yogis can hear. It is sound at its maximum pitch.
The other three levels of nada are:
Vaikhari ~ This is sound that is audible to the human ear.
Madhyama ~ This sound is heard in the mind.
Pashyanti ~ This is a sound that is perceived visually.
Believing that the whole universe is composed of sound vibrations, Nada yoga focuses on transformation from within through sound. The goal is to hear the ultimate sound, or para nada.
In Hinduism and yogic philosophy, the cosmic sound is the auditory manifestation of Brahman, the Absolute Truth or Ultimate Reality. It is verbalized as the mantra, Om (also spelled Aum). According to the Bhagavad Gita, “God is the sound of Om.”
The cosmic sound is associated with the creation of the universe. It is believed that before creation, the humming of energy existed. That energy became the vibration of creation and so the universe was created out of the ever-present sound of Om. This cosmic sound and its vibration still exists around and inside everyone.
“Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth.” ~ Marcus Aurelius, Meditations
“Above all, don’t lie to yourself. The man who lies to himself and listens to his own lie comes to a point that he cannot distinguish the truth within him, or around him, and so loses all respect for himself and for others. And having no respect he ceases to love.” ~ Fyodor Dostoevsky, The Brothers Karamazov