Each time the baby wails, the alarm system triggers the rod to forewarn and awaken the parents. Some baby monitors even come with LCD screens that allow you to literally watch over your baby. This is especially valuable to deaf parents since what they lack in hearing, they can make up for in visual observation. Audio baby monitors only make use of sounds while video baby monitors make use of a camera and transmitter to send video feeds to a LCD receiver. LCD or Liquid Crystal Display are the choice of manufacturers in video baby monitors since it is light, and is the best mobility wise compared to CRT devices. Video monitorsallow you to see and hear your child by combining sound and video just like miniature TV sets. They use a small camera either mounted on the wall, table or crib to transmit the images into the LCD display. They are usually portable and come with multiple cameras and even night vision. Sensory monitorsdetect the baby s slightest movements even during sleep. These interferences can also cause sounds to be muffled and inaudible. So Are EVPs Real? Do you believe in ghosts? Do you believe in the afterlife? 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. Cordless telephones may also interfere with your signal. In case interference is a big issue for you, you can always look for something that utilizes the so-called no-interference technology or has additional security features. Video Monitoring Options A basic baby monitor allows you to hear whatever's happening in the baby's bedroom. 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.