How do I know?

[[email protected]]

I've meditated consistently for many weeks now and yet my clairaudience/clairvoyance capabilities are practically non-existent. I've been doing the third eye opening meditation with the correct vibration for about a week and the opening of the crown chakra meditation for around 3 days.
How do I know when my third eye is open? Is it likely I'm doing the meditations wrong? When I meditate on my third eye it is complete blackness not even swirling colors though I do feel pressure in my forehead and a dull pain