The Metaphysical world is something everyone needs to explore according to Russell Brand. There is a lot more going on in this world than our senses can even pick up so who is to say that there are not vibrations or parts of this reality that are beyond our 5 senses? With that same trail of thought, it is reasonable to believe that there are vibrations beyond the scientific instruments that we have created as well.
Science is designed to measure reality by using what we can pick up with our 5 senses and our instruments. But we can only perceive a limited spectrum of sound, light, smells, tastes and vibrations. If we want to expand and evolve beyond ourselves we need to explore the metaphysical and spiritual realms as well.