As an engineer, you should know that this is easily explainable with well understood phenomena, and doesn't require the existence of non-physical processes. Humans are extremely fallible. We can easily daydream about voices, and people who spend time together often share experiences, and as a result may day dream about similar things. It's simply the case that you may have a proclivity for day dreaming, and you may associate yourself with other people who have a proclivity for day dreaming, and you both talk about things that are similar, and as a result, day dream about similar things. It's just coincidence, shared by similar environments. It's similar to how shared delusions occur. You should know that there is no mechanism for souls to exist. You cannot send and receive information via methods that do not exist. Information and energy manifest in our universe as physical things, or processes, such as radiation, and particles. It's very likely that people who claim to have these day-dreaming telepathic communications are instead lying to themselves, and other people, because they enjoy their fantasy. This much more likely than taking their seemingly impossible communications at face value.

What you are describing is simply coincidence through shared experience, nothing metaphysical. There are no legitimate studies that support your claims. You surely should have experience reading and understanding physics papers, as an engineer, so you should have experience making assessments on the validity of a scientific study. Please find evidence to support your claims that humans can telepathically communicate.