If silence had a scent, it would smell like the woods after a rainstorm. Just after, when you can still smell the rain on the leaves and the petrichor from the soil.
It can be the first breath you take in the morning, stiring from a long dream and no one else is awake yet. You can open the window, smelling the crisp morning air while you watch the sun slowly rising.
Silence also smells like a can...