It is heard in our scriptures or from elders that in earlier times there used to be Akashvani. So is it true or not.It's a YOGIK process,In the high state of meditation, one floats from his body. In that state no thoughts remain and pure consciousness starts flowing through it.What is the benefit of associating with such person? It will help you realise what one should do and should not do. This happens when you follow the path of cosmic energy.