Audio Interior
US $22.50
Recent Technologies Make Installing Multi-Channel Audio Products A Snap
The process of setting up multi-channel audio speakers in home theater products is fairly tedious and suppliers have invented new products and technologies including wireless surround sound speakers or surround sound wireless headphones lately to help simplify the setup. I will look at a number of of the newest technologies that were developed to make setting up home theater systems a snap. I will illustrate what to look out for when making your buying decision.
As in the past setting up a TV has been quite straightforward, the emergence of multi-channel audio has made setting up home theater systems a great deal more difficult by requiring a number of external speakers to create surround sound. The most commonly used 5.1 surround sound format requires installing a total of 6 loudspeakers. These are one center speaker, two front side speakers, two rear speakers and a subwoofer. The more recent 7.1 standard raises this number to 8 by adding two extra side speakers.
Thus setting up a home theater has turn out to be pretty difficult and long speaker wire runs are often undesirable for aesthetic reasons. Part suppliers have developed various technologies to simplify the installation.
One option is minimizing the number of speakers by making virtual speakers. This technique applies signal processing to the sound and adds phase shifts and cues to the sound that would usually be sent by the remote speaker. Because 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 speakers. The viewer is in effect tricked into assuming the audio is originating from a location other than the front speakers.
The benefit of this technology is that only a couple of speakers are required and no long speaker cable has to be run all through the viewing environment. The downside though is that each person will process audio in a different way as a result of the dissimilar form of each human ear. The signal processing is based on measurements which are done using a standard human ear model. If the form of the ear changes, sound will travel in a different way. Therefore virtual surround will not function equally well for everyone.
An alternative solution for eliminating long speaker wire runs is to use wireless surround sound products or wireless loudspeakers. A wireless product contains a transmitter and one or a number of wireless amplifiers. The transmitter connects to the source. The wireless amplifiers connect to the remote loudspeakers. This transmitter will normally come with line-level as well as amplified speaker inputs. Ideally it should have a volume control to adjust it to the audio source.
Several wireless kits come with wireless amplifiers that connect to two speakers. This still requires wire runs between the two speakers. Other products offer separate wireless amplifiers for each speaker. Entry-level wireless systems use FM transmission or audio compression that will degrade the audio quality to some degree. More advanced wireless devices use uncompressed digital audio transmission. Make sure that you pick a wireless system with a low audio latency, at most a few milliseconds. This will make sure 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. A high latency would lead to an echo effect. This effect would degrade the surround effect. Most wireless gadgets operate in the 900 MHz and 2.4 GHz frequency bands. A number of products utilize the less crowded 5.8 GHz frequency band and as a result have less competition from other wireless gadgets.
Another solution are side-reflecting speakers. These systems are also referred to as sound bars. In this case the audio for the remote speakers will be broadcast by individual speakers positioned at the front at an angle and reflected by walls as to appear to be coming from besides or behind the viewer. This solution works best in a square room with minimum interior design and obstacles. It will not work well in many real-world scenarios with diverse room shapes however.
do you need to go to a collage for car detailing?
im thinking about detailing cars as in audio, interior lighting and exterior lighting. my question is do i need a collage diploma to do this stuff and make money from it?
You have one answer that was very 'tonge-in-cheek'
NO you do Not need Collage to get a job to learn that trade.
Find a place that does the work and try and get a job there, Work experience helps, and learning on the job is a time tested method.
Now, if you want to strike out on your own and be your own boss, then some business courses will help you a lot.
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