Sound-Silence Relationship

Is there a difference between sound and silence, or is either frequency created with the same matter? In other words, is the sound of HU the sound of silence, and if so, how can we define/experience it?

I would like to encourage you to try to figure this out for yourself. As a hint to one of the answers Paul Twitchell quotes Rebazar Tarzs in the book The Far Country: “Only by entering into divine silence and closing our eyes and ears to the world of illusion can we hear the celestial melody…”

If you know your answer, here is another quote from the same book: “We call impersonal that state of intuition in which our thought is no longer divided into a thinking subject and an external world, but rather the outer world is abolished by its integration into our personal consciousness.”