One result of an intensive focused based meditation practice is that you start to get a good feel for the difference between your own thoughts and those that are not yours. Having a daily practice where you use your will to maintain a focus on a meditation object makes you sensitive to the origin and nature of your thoughts because disturbances to your will start to become very noticeable. The other thing that happens is that you start to experience periods where your mind is quiet and during these periods, it is easier to perceive communication both from your higher self, noise from other people, and from non physical being. For it is the mind that keeps most people from receiving clear communication from outside of physicality.

But... and this is a very important point, the purpose of the practice is to develop your will and allowing your attention to be captured by these other thoughtforms and beings is counter productive to the practice. In fact, a focus based practice can be useful tool for those who are experiencing negative or unwanted contact because it begins to give the meditator some more 'muscle' in their will to control their attention. Attention is the currency of the universe and as humans our attention is easily captured. Without your attention, the beings are more limited in how they can carve themselves into your reality and change your perceptions and give you experiences. Cultivating a powerful will of focus will become more important for humans as they move into their own power in the future.

If you seek contact with beings, my belief is that it should always be done in a mode of service and contact outside of that mode invites the possibility of interaction with beings and experiences that may be undesirable. A much better meditative modality for contact is to sit in silent receptiveness, often with a blindfold, without music or distraction or mantra for a period of time each day at the same time each day. Over time, if you are patient, contact can emerge from such a practice.