These questions seem to have no specific and factual answers and so does the question Are EVPs real? A sound is just a sound and it all depends on how they are interpreted. If the sound of a cat is interpreted as a moo of the cow, then it comes from a cow. If an inaudible noise is interpreted as voices of people from the afterlife then it comes from people in the afterlife. With this kind of device, you can monitor your baby as if you were actually right there beside him or her. Video Baby Monitors and Night Vision Baby monitors develop together with technology. As of current date, there are a lot of different baby monitors all of which have their own unique functions. One of the latest baby monitors are video baby monitors with night vision capability. It would also be good to note that you should switch the cordless phone base last. 4) Using Digital Monitors The latest technology has spawned a new breed of baby monitors digital. These types of baby monitors have been made to counter any kind of wireless interference. This may cost a little more than the analog versions, but if you do have the money to spare, then try to go digital. Today, different baby monitors have been developed which make use not only of sounds but of images as well. A great example of this is the video baby monitor. Video baby monitors make use of cameras instead of just the usual transmitter with microphone device. A camera or a number of cameras are installed in the baby s room and live video feed are transmitted to a TV or LCD receiver. Because of the number of tenants who also use different gadgets, interference among baby monitors is quite common. With this kind of setup, security and comfort of your baby may be put at risk. Fixing Interference Problems Baby monitors are great help for parents who are always on the go. These gadgets enable parents to multi-task do other chores while still being able to watch over their baby. One-way monitors from the name itself, basically only transmit sound through a single channel wherein parents can hear the sounds that their baby makes from the other end. However, the much-improved two-way monitors can allow parents to talk back to their child with their own portable transmitter. Parents who have children with separation anxiety often prefer this type of monitor, as hearing a familiar voice could usually calm the child.