It took the team composed of Dr. Amar Bose and Bose senior research engineer Dr. William R. Short almost fourteen years to develop this state-of-the-art concept. Their innovation can be understood with the following explanation:
We all know that when a speaker is mounted in an enclosed channel or tube, the cone movements act as a wave guide, producing higher outputs than the actual output from the speaker. The Bose engineers quickly discovered that the above wave guide phenomena could be effectively utilized for operating speakers with utmost efficiencies.
It was understood that by incorporating a wave guide, smaller speakers could be used for acquiring richer outputs, irrespective of the volume of the music. However it was easier said than done: the concept definitely required some serious calculations and a lot of trial and error experiments to be done before it could actually be implemented.
The actual theory is a trade secret and has been patented, and therefore all the details cannot be revealed here, but the following points can make the idea considerably clear to us, as far as the operation is concerned:
At Bose, the engineers started calculating the exact area of the wave guide and the way it could be accommodated inside smaller enclosures. This led to the development of a long channelized waveguide structure, very complexly woven into bends and curves. This enabled the vibrations from the speaker to pass across the entire waveguide in such way that the final output not only retained the actual clarity of the audio, but enhanced it with additional depth and theater-like experience. The careful calculations involved with the waveguide design helped the inventors to design much smaller wave radios than its predecessors.
In the CD players, for the best possible results, the CD mechanism was placed at the center, with the Bose waveguide structure coiling past it. The design ensured maximum efficiency for the audio output, keeping the CD mechanism well isolated from any residual vibration imposed by the waveguide.
The electronics involved is also well optimized in a Bose Wave radio, where the tonal balance of the output is kept within the best possible human hearing perception by automatically compensating levels whenever the volume is increased or decreased.
More technically the concept can be summarized as follows:
When a speaker vibrates, the vibrations are transformed into audible sound waves. However with conventional systems, the rear of the speakers are shut off or covered up, so only the vibrations generated at the front of the speaker become audible. The Bose wave guide system intelligently channelizes the rear vibrations of the air from the speaker so that these vibrations are also effectively transformed into audible sound. The intricately calculated structure further enhances this output, producing outstanding sound output with minimal space utilization.