Does the deceased hear whoever speaks to him without a visit, or is this matter among the unseen? And is seeing the deceased in a dream a real encounter or merely a jumble of dreams?

There is no explicit text stating that the deceased hears the words of their family from afar. Rather, it has been reported that they hear the shuffling of the mourners' sandals as they depart. It has also been reported that the deeds of the living are presented to their deceased relatives. If you are unable to visit your father due to distance, you can supplicate for him, seek forgiveness for him, and give charity on his behalf. Seeing the deceased in a dream is not considered a real encounter; it is subject to dream interpretations and no legal ruling can be derived from it.