[Home Theater Network] Ming Dynasty writer and dramatist Mr. Li Yu has a famous saying that "the piano is easy to ring and difficult to fine", which means that it is very easy to make a sound, but let the sound of the piano be beautiful and intoxicating. It is very difficult. Borrowing this sentence, home theater audio is also very appropriate. Before we shared an article "Why I don't recommend buying a few thousand home theater speakers", it is also true that at a very low cost, it is impossible to create good things.
In the home theater audio system, the speaker speaker is the main sounding component. After years of development, the speaker has produced many related technologies in the process of continuous research, exploration and manufacturing. The home theater audio equipment technicians use these technologies. More in-depth exploration and development of speakers, in order to enable the speakers they produce to restore more accurate, natural, real sound. This also proves that home theater audio is also easy and difficult.
“Easy to sound†means that the speaker has few components and is easy to manufacture. “Difficult to improve†means that the speaker has to be refined and done well, and it is very difficult to become a boutique in the industry.
The speaker in the home theater audio system is an electroacoustic device, which contains only a few dozen components, but in this electroacoustic device, it includes many disciplines such as electronics, acoustics, and electromagnetics. The extent is far beyond people's imagination. There are many other factors in this:
(1) The speaker is a device with multi-level energy conversion and multiple feedback. The energy conversion of the speaker is to convert electrical energy into mechanical energy, which is then converted into sound energy by mechanical energy, and finally perceived by the listener. This multi-level, multi-feedback energy conversion brings complexity and diversity to the system. This is rarely seen in general industrial products.
(2) The working state of the speaker is not static but vibration. The vibration of the loudspeaker is in a three-dimensional space with multiple boundary conditions, and the analysis of this vibration is very complicated.
(3) When analyzing the speaker, the equivalent circuit method is usually adopted, and the speaker is regarded as an equivalent circuit composed of concentrated parameters. Because of the familiarity with the circuit theory, it is very convenient for us to analyze the speaker. However, this method is only suitable for the bass band. Assume that the speaker is a rigid body. As the sound frequency band increases, the speaker is not a concentrated parameter component, and the diaphragm exhibits split vibration. In the high-frequency segment, the speaker is analyzed by an equivalent circuit. Will fail. The vibration at each point on the diaphragm is different, each point has a different amplitude and phase, and each point affects each other. If we can assemble an amplifier according to the circuit diagram, but for the home theater audio speakers, the same unit composition, if the experience is different, there will be a big gap.
(4) The evaluation of home theater audio depends on a large number of test indicators, but these test indicators can not fully summarize the quality of a speaker, so these are objective factors, and the subjective evaluation of the speaker is also indispensable. The objective indicators of the evaluation are relatively fixed, while the subjective evaluations are highly discrete, often differing greatly depending on the person, the environment, the source, and the psychological factors of the listener's consciousness or unconsciousness. influences.
(5) The production process of the loudspeaker involves many fields, reflecting its comprehensiveness and diversity. Changes in materials are especially important for loudspeakers. The same shape of the diaphragm or its subjective sound quality will change due to the material.
These aspects have brought many incomprehensible problems to the speaker designer, making the speaker sound easy, and making the speaker a recognized quality. It is precisely because of this that the combination of art and technology combines ancient acoustics with modern science. To make the home theater audio field more attractive.
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