[Home Theater Network HDAV.com.cn] For the pursuit of home comfort environment, friends who have requirements for audio and video effects, custom installation and installation of their own independent audio-visual room has become more and more the trend of the audio-visual market across the country, and not necessarily I have to go to various large commercial cinemas to listen to the sound of melons.
As an important part of the decoration of the audio-visual room, the acoustic decoration treatment is an extremely important part in addition to the sound configuration. In the case of many space decoration treatments, although there are many excellent designs, they often fall into some misunderstandings.
Misunderstanding, Ignore positioning, crazy decoration
After receiving the customer's demand and providing the length and width of the room, many audio practitioners directly took the general standard speaker position and positioned it, and then slotted the installation with “efficiencyâ€. It is only after the installation that the listening position is not in the position you designed. The original "very standard" speaker position is completely wrong.
The end result is that either accepting an imperfect positioning or reworking is a toss.
It is better to have a book than a book! The official recommendation is a design of the ideal space, but in the face of the needs of customers, the listening position will often be changed due to other factors or design changes in the audio-visual room, such as whether you need to increase the bar. And the depth of the bar may directly affect the change of the listening position, and the left and right entrances of some non-ideal audio and video rooms may also affect the choice of listening position.
Always remember a principle that all speaker positioning designs are designed for listening to the phoneme, not just the ideal location of the space.
Misunderstanding 2 acoustic treatment must be better than not handling
In recent years, the importance of audio-visual space acoustics has been valued by more and more audio-visual enthusiasts. However, in many engineering cases, consumers use a lot of materials and spend a lot of money and energy, and the final result is far less than expected. Even worse than not handling it.
Therefore, do not think that the acoustic treatment must be better than no treatment, the random processing is often half the effort, not worth the loss. Be sure to have a selective prescription for a positive acoustic effect.
Misunderstanding 3
"Acoustic reflection will cause blurred image and unnatural tone balance." Based on this theory, many habits of making audio and video space first consider sound absorption. And everyone seems to have accepted the theory that the left and right sides must strengthen sound absorption, and the original intention is not wrong.
However, the results of sound absorption in many cases are not ideal. Excessive sound absorption will make the sound hard and lacks the power of the show, and it will also waste a lot of power of the amplifier. The reason is also that the actual acoustic parameters are not considered. It is a standard practice for some companies to go crazy.
It is the frequency that is excessively absorbed, and the freshness of the medium and high frequency is lost. In fact, readers can absorb and diffuse to solve the problem of acoustic reflection, so that "75% of each wall can evenly distribute the sound absorber, and the other 25% can be diffused to make the sound decay more natural." Smooth, of course, more accurate depends on the specific circumstances. This also makes people do not be too dull and depressed when doing other leisure activities in the space.
Misunderstanding 4: Using software simulation instead of actual measurement
At present, most acoustic companies adopt such a method: on-site measurement or directly provide customers with long-width and high-level room type data, and develop an acoustic treatment scheme in the form of software simulation.
This method actually hides a serious hidden danger, and in the first link, it has an uncertain and uncontrollable factor for the final sound effect. We know that the reflection coefficient of wall materials is different, and the actual low-frequency reflection of each wall is very different from that of solid brick, hollow brick or reinforced concrete wall. The software cannot judge and objectively analyze these situations.
The correct and scientific approach is to use a professional test equipment with a monitor speaker with a flat frequency curve to perform a full-frequency analysis of 20-20 kHz in the audio-visual space, and then obtain a targeted acoustic scheme after obtaining the frequency index.
But the only problem with this test method is that the cost of running the test equipment and the acoustic engineer is high, and not every company is willing to adopt it. So don't say why you take a few machines to collect money here, our profession, and our rigor, the final value will be reflected in our final effect!
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