Silence is helpful, but you don't need it in order to find stillness. Even when there is noise, you can be aware of the stillness underneath the noise, of the space in which the noise arises. That is the inner space of pure awareness, consciousness itself.
You can become aware of awareness as the background to all your sense perceptions, all your thinking. Becoming aware of awareness is the arising of inner stillness.
from: Stillness Speaks