Imagine a room where low, middle, and high frequency energy is dealt with in a systematic and effective way with all new room acoustic technology. This room would have all the necessary type and amount of low frequency absorbers placed at the proper positions in the room. Horizontal and vertical diffusion will create a two dimensional sound field for the middle and high frequencies on all front, rear, and ceiling surfaces.

The room would have new foam technology to absorb just the right amount of middle and high frequency energy to reduce reflections from the room walls at the listening position. Imagine a room where the ceiling is a blend of diffusion and absorption to give our sound stage presentation height beyond the ceiling boundary.

Our sound stage in our room will have a height, width, and depth that extends beyond the existing room boundaries. Instruments and vocals will have distance and distinct separation between them. There will be air in our sound stage and the visceral connection to the music will be immediate and without effort. You will be taken out of the first row and put on stage with an instrument to play. You will have no choice but to play it. Imagine this room fits inside your existing room with no screws, nails, or sawdust from power tools.

Watch for our PERSONAL LISTENING ENVIRONMENT (PLE) this Christmas.

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The term noise is defined in many ways. The first definition I found of noise in all the electronic dictionaries I surveyed was about our industry of music. Merriam-Webster summed up most publications efforts by stating that noise is “sound; especially one that lacks agreeable musical quality or is noticeably unpleasant”. This is interesting. We have an individual’s opinion as the basis for the definition itself.

Sound that “lacks agreeable musical quality” can be sound that my grandmother would call noise, but I would call Santana. I do not think I would call any of her music noise, but I would surely call the recording process that was used noisy. I do not think I would call younger people’s music as noise. I would call it noise, however, if the compressed mp3 music they are listening to is leaking out from around their ear plugs and entering my ears at the DMV. I am certain the 3 sets of bones in their middle ears are calling all that pressure noise. If not now, they will be in say, 10-20 years.

“Agreeable music quality” must be replaced with “disagreeable music quantity” It really is the sound pressure and level of the pressure that causes our brains to label the phenomenon “noise”. Different pressure levels produce different reactions in different people. It probably is a defense mechanism to protect our hearing.

People tell me if you really want to “hear” pressure go stand next to a jet taking off. Maybe so, I have never done that. I have stood at the starting line where two, nitro burning, 8,000 horse power, funny cars were staged and ready for a green light. When the light hit green, I recorded 170 db, my pant legs were flapping so hard they made noise and my lips were bent out of shape as if my head was out a car window at 120 mph. Now thats noise.

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We can make some interesting and not really discussed observations about our audio speakers. Lets keep our discussion in the playback domain of our recorded source material. Our playback system will need to be set up in a room with 4 walls, ceiling, and floor.

Our audio speakers will be a two channel system operating in stereo mode. Our first observation must deal with the reflections which occur from the sound generated by our audio speakers and the walls, floors, and ceilings. Primary, secondary, and tertiary reflections all confuse the direct energy which is the energy that reaches our ears in the shortest time frame. Sound that travels in a straight line from our audio speakers to our ears is called direct sound. Sound that is reflected off of room boundary surfaces is called reflected sound.

One of the sonic consequences of these reflections between our audio speakers and the room is a term called coherent interference. This is the name for the sound issues that result from all the room boundary reflections bombarding the listening position with all this “interference”. This coherent interference affects the lower mid and upper bass regions of our sound presentation. Vocals are smeared and blurred and instruments in this region may not be heard.

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What must our home theater room have in it to make it a home theater room? It must have a video display unit. It could be a projector with screen, a lcd or plasma flat screen, or simply a crt television. It must have a receiver to process audio from our dvd, amplify this audio and send it to numerous channels which are all represented by speakers. It must have a sub woofer to provide low energy output into the room as to try and acoustically recreate explosions and car crashes.

Our home theater room must also have the ability to control external light from out side, so as not to interfer with the video display inside. The room must be of adequate size in both width, depth, and height to allow for proper video display sizing. The room must also be large enough to be able to position side and rear channels to allow for this energy to be utilized correctly at the listening position. Low frequency energy from the sub woofer needs the most room volume it can get to be heard as realistic.

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