Senin, 09 Desember 2013

How To Find The Ideal Wireless Surround Models

By Martina Swagger


Setting up multi-channel audio like a home theater system has always been relatively difficult and manufacturers lately have created unique products and technologies such as wireless audio products or virtual surround sound to help simplify this procedure. I am going to take a look at several of the newest technologies that were developed to make installing home theater systems a breeze. I will suggests what to look out for when making your buying decision.

Consequently the setup of home theater systems has become a fairly difficult procedure. Numerous homes are not pre-wired for surround sound. In addition, long speaker cables are often unattractive. A number of technologies have appeared to simplify this process.

The first method is also known as virtual surround sound. This technique will take the audio components which would ordinarily be broadcast by the remote loudspeakers. It then applies signal processing to those components and inserts special cues and phase delays. After that these components are mixed with the front speaker sound. Since the signal processing is based on how the human hearing detects the origin of audio, the audio components which underwent signal processing can be mixed with the front speaker components and sent by the front loudspeakers. Because of the signal processing, the viewer is tricked into believing the audio is originating from virtual remote surround loudspeakers.

The benefit of this technology is that only a couple of loudspeakers are required and no long speaker cord has to be run all through the viewing environment. The downside however is that each human will process sound differently as a result of the different shape of each human ear. Because the signal processing is based on a standard human ear model, virtual surround will not work equally well for every person depending on how much the viewer differs from the standard model.

Another solution for simplifying home theater setups and eliminating long speaker cable runs is to use wireless surround sound systems or wireless speakers. A wireless solution will typically include a transmitter module that connects to the TV or source as well as wireless amplifiers that will be connected to the remote speakers. This transmitter will usually provide line-level in addition to amplified speaker inputs. Ideally it should come with a volume control to adjust it to the audio source.

As a number of wireless speaker devices come with a wireless amplifier that connects to two speakers, other products offer separate wireless amplifiers for every speaker. The most sophisticated wireless devices utilize digital transmission to eliminate signal degradation. Ensure that you pick a wireless system with a low audio latency, at most several milliseconds. This will make certain that the sound from all loudspeakers, including the non-wireless speakers, is in sync. Low latency is also important for good sync with the video. Otherwise there will be a noticeable echo kind effect. Some wireless systems operate at 5.8 GHz which offers the benefit of less competition from other wireless products than systems employing the crowded 900 MHz or 2.4 GHz frequency band.

A third technology utilizes side-reflecting speakers. This option is referred to as sound bars. The audio that would ordinarily be broadcast by the remote speakers is instead broadcast by loudspeakers at the front. These front loudspeakers broadcast the sound at an angle. Then the sound is reflected by the side and rear walls and appears to be coming from besides or behind the viewer. This approach works best in a square room with minimal interior design and obstacles. It will not function well in many real-world scenarios with diverse room shapes though.




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