@Ostap This post appears to be part of this conversation, so I have merged the topics. The answers also overlap.
As others have said, to be able to sense the entities when they come, which they usually do, this is a skill that takes the right input from you, and development of your astral senses. You could be surrounded by spirits yelling out you but if you are deaf to them it won’t matter.
Have you been doing anything to build your psychic aka astral senses t all? If not take a look at these free tutorials and see if you can pick up a daily practice to develop them.
On the other hand you don’t need to sense them to get magick to work, but the method is in how you do it not so much what you do. Do imagine the result as being here now, don’t just say a chant and focus on the chant, that’s useless. read more around the forum as this is a common problem and it’s been discussed so many time and so many ways, if you look it up you are bound to find a way that suits you better than the rest.