What is the significance of Lord Shiva and Lord Vishnu's association with Damaru and Shankha?

Smt. Priyanka asked: Swami, is there a specific reason as to why Lord Vishnu and Lord Shiva are associated with Shankham and Damarukam respectively? What does it signify? When and why is it used by Lord Vishnu and Lord Shiva? Also, is there a reason why God Brahma does not hold a sound-producing item?]

Swami Replied:- God Brahma represents the knowledge spoken by His throat. His throat itself is the sounding instrument. Knowledge is the meaning of the words and words alone are related to the sound. God Vishnu represents soft nature and love balanced with some seriousness in punishing the sinners. The conch shell or Shankha denotes sweetness mixed with little harshness. The Damaruka indicates full harshness because God Shiva becomes fully furious in destroying the world.