Symptoms of this type of apnea include snoring, labored breathing, gasping for air, and changes in color. But the cardinal sign of obstructive apnea in babies is restlessness. Another type of apnea is central apnea. This is usually caused by defect in the part of the brain the controls breathing. In babies, this could be a congenital defect. 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. 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. Factors To Consider Before Purchasing A Baby Monitor Buying the most expensive baby monitor on the shelf is not necessarily the best idea that any parent could muster. As a result of sticking to this course of action, the monitor gets to capture the initial accessible signal that will give out the most excellent reception and not impinge on your other wireless gadgets in the process. 5. Consider purchasing a digital baby monitor. If you want to ensure that your next-door neighbors won't be able to pick up the transmitted sounds from your baby monitor, purchase a digital version instead of an analog one. Most of the time however, this system is used to keep tabs on your nanny, caretaker or babysitter instead of the baby. You may want to make sure that whoever is in charge of your baby at that moment in time is giving his or her utmost care and love. Other uses of these baby video monitors system over the Internet is when you badly want to see your baby but can t since it still office hours. However, with the many different kinds of monitors available in the market at present sometimes it may get confusing. Knowing the different types of monitors and what to consider will surely help you in making a choice. What are the types of baby monitors? In selecting a monitor that best fits your family, you have three major options to choose from an audio, video or a sensory monitor.