If you prefer to have one radio transmitter in every room, there are actually a smaller number of choices. In order to set up a multi-room monitoring system, some parents purchase more than one baby monitors. By simply positioning one radio transmitter in each room, you can listen to the sounds coming from your baby's room even if you're busy with house chores or other stuff. Other wireless baby monitors from your neighbor s house can also cause interference. Fortunately, there are ways to solve these kinds of problems like adjusting channels or changing frequencies. Another disadvantage of wireless baby monitors is the range. It may have been freed from the clutches of wires but they are still limited on how far the distance of the baby s device is from your device. Instead, they receive muffled, indefinable, and sometimes almost inaudible sounds which resemble voices and words coming from a human. When examined by experts, these sounds can t be technically explained. But when examined by professional ghost hunters, they turn out to be ghost voices also known as electronic voice phenomenon. Parents, especially busy parents, install these devices so that they may be able to observe and tend to the needs of their baby if they are located in a different place at home. But another very useful function of baby monitors is during sleeping hours. This best applies to a setup wherein the baby stays in a room separate from the parents. Because of these occurrences, a lot of people have made it a point not to mention any private or confidential information while the baby monitor is switched on. Interference with cordless phones and wireless routers is also a common problem. Every now and then, your baby monitor may compete with these wireless devices for better signal reception. When it comes to audio and video baby monitors, quality offered by digital technology is superb. Another advantage that digital technology has is that it provides clearer reception. The digital receivers, whether a microphone or s camera, are also more sensitive to sound and visuals respectively. One problem of analog baby monitor devices is the fact that there are instances when neighbours can actually tap in to the signal of your baby monitors and listen.