According to the Nyaya and the Vaisheshika schools, Shabda means verbal testimony; to the Sanskrit grammarians, Yaska, Panini and Katyayana it meant a unit of language or speech or vac.
[2][3] Purva Mimamsa deals with Shabda Brahman ('cosmic sound or word') which is endowed with names and forms and is projected in vedic revelations (the mantras, hymns, prayers etc.).
Vedas are not the product of conventional language but the emanation of reality in form of Shabda (sound, word) which is the sole cause of creation and is eternal.
Purva Mimamsa, an esoteric discipline, from the point of view of spiritual growth aims at attaining the heavenly happiness by realizing Shabda Brahman (cosmic sound) by conducting yajnas that help control the senses and the mind; when the mind and the senses are subdued the inner subtle sound is realized as Shabda Brahman.
[8] In this context Srimad Bhagavatam (Sloka III.33.7) has also been relied upon to high-light the disregard of Vedic rituals by the advanced transcendentalists.
[10] According to the Tantric concept, Sound is the first manifestation of Parama Shiva; in its primary stage it is a psychic wave.