Among all the audio components, the system speaker is where there are major differences. We can find a wide variety of baffles prices available that offer a great sound, but on the other hand, some models of famous brands cost in excess of U.S. $ 50,000 the pair. We can also enjoy great differences size: small type of deflector, which fits on a shelf, the boxes of more than 2 meters high, that despite hundreds of pounds. There is some justification for this technological diversity is simply a whim or design? The simple answer is that real bass for a great speaker is needed. This is effective, but seems to be more like an intuitive response to a justified. The fact is that the principles governing the behavior of the deflector and the electro acoustic transducers that comprise it, is completely unknown to the common for music enthusiasts, who tend to attribute ideal physical properties comparable to the remaining parts of the sound system, such as amplifiers, CD players, equalizers, etc.
We must take into account that only a few decades ago was to ignore the behavior that would have a driver, or transducer electro acoustic, within a baffle. Magnitudes as frequency response, cone excursion, impulse response, the group delay, phase delay, was not possible to predict the driver of the baffle system and the final product was the result of many tests and experiments with boxes of different volume, ports, damping, etc. This is because, until recently, had not been given a mathematical model for the behavior of electromagnetic acoustic transducer on the baffle.
The speaker dynamic higher remained virtually unchanged since its invention in 1925 by Rice and Kellogg, two engineers from General Electric Research Laboratory. Technological progress has improved its manufacturing process, materials and design of the cone, the power of the magnet, but the physical principle has remained unchanged: the diaphragm with a coil that is within the magnetic field of a permanent magnet, varies due to the alternating current applied to the coil. This simple principle is capable of producing sound in almost all the chicanes on the market. The electrostatic plasma and columns, among others, are an alternative way to produce sound, but due to physical limitations and techniques, which had little market penetration.
The advent of sound films was a major boost to this industry, but the baffle system transducer remained a mystery. It was not until 1972 that Richard Small, based on earlier work by Neville Thiele, published in the "Audio Engineering Society, a series articles on the analysis of systems baffle, closed and vented boxes, using an equivalent circuit. The relevance of this is that they allow the model of the baffle system transducer as an equivalent electrical circuit of an RLC, already known and foreseeable effects. Now, with the help of Thiele-Small parameters, especially for each transducer, can predict their behavior in Baffle without building the baffle.
One of the equations of Thiele-Small gives us a clue about the size of the baffle, its frequency response and efficiency, which can be described as: the efficiency (n0) is proportional to the cube of the resonance frequency (Fs), multiplied by the equivalent volume (Vas). This means that, for example, if we are to achieve an eighth extra low, reducing Fs in a factor of two, while maintaining efficiency (N0), we must increase the volume (Vas), a factor of eight. This explains why it is so difficult to reach and frequency 25Hz and why it is necessary baffle to deliver great bass real.
It is, therefore, those who opt for small speakers, easy or cost, are invariably sacrifice a significant range low. On the contrary, those who chose the large baffle at the expense of aesthetics, no doubt, will enjoy a more vivid experience realistic and nice music.
Gaston Gazabatt Is an engineer in Information Technology and some of its main interest are in the audio and sound technology area. On its website related to food processors http://www.cuisinartfoodprocessorsearch.com you will find the best advices and product comparison among the cuisinart food processors.
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