electronic devices

Virtual Surround Sound
Virtual surround sound has the same effect as having 4 or 5 speakers around the TV, but it uses fewer speakers and not as many cables. These systems come in two kinds 2.1 surround and digital sound projection. Most of the time, 2.1-surround systems use two speakers in front of the listener and a subwoofer placed somewhere else in the room. These sound like 5.1 surround system which has five speakers and a subwoofer. Digital sound projectors, on the other hand, use a single strip of small speakers to produce sound. Many digital sound projectors do not include a subwoofer. Both of these systems work in the same way. They use certain techniques to modify sound waves so that they seem to come from more speakers than are really there. These techniques came from the study of psychoacoustics, which means the manner in which people perceive sound.