【 Weak current College 】 karaoke engineering design

A clear customer requirements and field conditions
At present, different size, different grades and different features of karaoke Hall in investment size can vary greatly. Such as only using a DVD player, a power amplifier, a pair of speakers, a color TV and two microphone simple karaoke Hall, its equipment investment but two $; whereas a full-featured, device elegant large karaoke Hall, its equipment investment you can amounting to hundreds of thousands or even millions of NT dollars. In fact, karaoke Hall audio design also is not that much money, nor how much money is saved, the key lies in our how to use the foot and use all of the investment funds, how much should the number of results. In both functions, effects, and other aspects of the device level factors of rational allocation of capital, money well spent to edge up. One-sided pursuit of device functionality and all, or only focus on one aspect of the system or certain aspects of device capabilities and targets, regardless of the entire system of interaction are very wrong. The result is often considerable despite the investment of funds, purchase of luxury brands of imported equipment, but actually can, sound effects, but it is not satisfactory.
The karaoke Hall sound system design, we first need to clear the main issues are:
1, karaoke Hall functions
The difference from using the functionality, we can use Karaoke Hall divided into: stars, dance halls, nightclubs and multi-function Hall, and so on. Which stars to karaoke for the main types of activities, focusing on audio and video effects, lighting requirements less; dance halls due to also take into account the dance hall, and so the lights are often to have greater input, at the same time, due to the influence of light, its projection of results are often very poor (image may be very faint, indistinct), we should focus on the factors taken into account; nightclubs because the band accompaniment, to the sound mixer input channels andthe number of microphones require more requirements, it is more focused on live performances (music, singing and performances), and therefore the requirements of the projection. Function room considering meeting the requirements of the voice system and so on, with special emphasis on the control of the reverberation time.
2, karaoke Hall device functionality
The same is a karaoke lounge, they are functionally can still be great differences exist, this difference is mainly comes from we use the equipment of the type, quantity and functionality, so we put it generally referred to as device functionality differences. Device functionality differences reflected in many ways: for example, for the purposes of the program source, we can make use of program source, is a video recorder or DVD player, or if at the same time equipped with VCR and DVD player, etc. But here we are only a few main points for discussion.
(1) audio systems feature differences
From the audio sources, simple karaoke Hall as long as equipped with a wired microphone and laserdisc player should be sufficient, but a large karaoke Hall are also equipped with a deck, CD player and wireless microphones, etc. The sources, use the kind of preamplifier, and can have several different situations, such as small karaoke Hall without special preamplifier, as long as you use the merge type of power amplifier that can meet the requirements, but large karaoke rooms tend to use a dedicated mixer, according to the performance of the scale, the number of program source on the input channels: sound mixer and have different requirements. Amplifier and speaker system is based on the public address form the great differences in spite of karaoke Hall lot use centralized or distributed for PA systems, but whether to adopt the two-channel stereo, Dolby Surround and the need to retrofit woofer, stage back to listen to, but is optional. Now, the entire sound system has been developed, the basic functionality of the karaoke. However, different features of the sound system is still a very big difference, such as whether to use sound Exciter, can tone, artificial reverberation and room Equalization effect, etc. Due to the difference, so the function sometimes despite two karaoke Hall sound more or less large, but the cost difference is possible.
(2) video system functionality differences
Video system to feature differences that I have "obvious". Simple video systems only use color TV, projector or television wall to display from the DVD player or VCR background screen. If coupled with camera and video special effects machines can take singing scene and overlays, mixed or designated to the original background. If coupled with subtitles, you can instantly see all kinds of text information. We even can use the VCR or video impression machine will perform on-site recording to tape or photo looks for guests to enjoy and save.
(3) lights functional differences
Lighting can type, quantity and functionality on the larger difference. Obviously, the greater the quantity of light, its combination of patterns, colors and patterns, the more natural, but also the more variation. Voice-activated, strobe, dimmer, discoloration, lines, patterns, actions and control methods, and so on is the lighting function on the main aspects of the variance.
(4) other aspects of functional differences
Other feature difference mainly embodied in the song method. Traditional song by guests from thick this song as a single, like finding a needle in a haystack and want to sing songs while using the computer management of VOD system is very simple, guests need only enter via a touch screen and want to sing the song name or the name of the original singing star or songs pop 's, you can quickly find it's the "whereabouts".
3, building models and acoustic conditions
We know that good sound effects not only on the electro-acoustic system quality and configuration, and electro-acoustic systems areclosely related to the acoustic environment. We may wish to make the idea of two extremes: one is in the open field, and one is in a sealed spherical building, it is clear that even with the best electro-acoustic devices are often difficult to achieve an ideal sound. In recent years, in the Auditorium acoustics design has two compelling direction: one is the use of computer room sound field simulation, architectural acoustics, acoustical design purpose realized; the second is the use of the introduction of electroacoustic device support and control of the acoustic environment, namely, the use of electro-acoustic devices to compensate the building acousticsComparison of foot, which is typical of artificial reverberation technology development and improvement.
Currently, karaoke Hall sound design is mostly the conditions in the existing building, room shapes and geometric dimensions tend to be fixed, and what we can do change and adjustment is too small, so the significance of acoustic design and not too big. However, there are serious flaws and difficult to use electro-acoustic devices to compensate for the room, we must be in the range of architectural acoustics. Mainly has following several kind of situations:
● 1 if there are large areas of surface indoors, especially in a circle and sphere of Hall, due to the sound of aggregation and softly Gallery effect, very easily lead to uneven sound field. We can use tuning room, bar, background, changing rooms, smart layout to the appropriate remedy, namely, to make full use of partition, reclaim and other methods to eliminate Hall of surface.
○ 2 If room reverberation time is too long, and even obvious echo phenomenon in interior decorating process must pay attention to take the appropriate measures for sound absorption.
○ 3 If room nearby or room has more obvious noise source (background noise reaching more than 30 ~ 35 decibels), it is necessary to take appropriate measures so that the background noise is reduced to the extent permitted.
○ 4 If the dance halls close to residential areas, we must take into account the strong music may bring harm to others, the corresponding sound measures must be taken into account in the design.
Using Architectural Acoustics to improve listening environments, due to the large scale investment, design and install complex, easy to use resize without shortcomings. Therefore, we have become increasingly attached importance to adjust in a flexible, easy to use, inexpensive method of electro-acoustic control. According to the different architectural form and acoustic conditions, we mainly to clarify the following questions:
● 1 whether it is necessary to use artificial reverberation means to compensate the natural reverberation of inadequate;
○ 2 have no need to use the room equalizer to improve the transmission characteristics of the room;
○ 3 uses Mono, stereo or surround sound amplifying system;
○ 4 auxiliary speaker's use need.
In short, the room of the building forms and acoustic conditions we are important basis for sound design. Any off-specific room, not understanding the room shape, size, structure and design of the spatial layout, are meaningless.
4. possible input of funds
Even the best design solution, if you do not have the appropriate funds, can only be on paper. In the design we often face the problem is the lack of funds, in which case we must repeatedly weigh those unused equipment available to appropriate deletion, or the appropriate grade of reducing some devices. For example, in some small and medium-sized karaoke Hall, mixer, compressor, noise gate and wireless microphone, and so can not. In addition, part of the domestic power amplifier and television sets, equipment for their quality and performance has reached a very high level, but the price is higher than similar imported products are much lower, so the selection of some domestic equipment is also a useful way of reducing costs.
How tominimal investment, the most comprehensive results, is our design principles and goals. In the audio sector, especially the "enthusiast", often used a few times and even more than ten times the price to increase the effectiveness of seeking minimal, and this effect often ordinary audience cannot detect. In fact, sometimes because of the listening environment and other objective criteria, quality reaches a certain level is very difficult to improve, so at this time, and then choose more high-grade equipment is Lao and reactive.
In the early stages of the sound system design, often need to investors, business users, sound designer and architectural decoration personnel repeatedly and learn, discuss, and to determine the use of the karaoke Hall, room distribution, devices, device classes as well as the scale of investment, etc.
Investment managers themselves often have some ideas, but because of the technology of electro-acoustic equipment knowledge, for much of the investment to get the kind of results, in other words, they receive the specified effect how much investment is not so clear. This requires that we, in a specific programme on receive and what kind of audio and video effects, need to invest as much money as well as future investment results for a forecast. At the same time, we also tried to investment managers describes today's Karaoke development of new trends, such as what a new device available, you cannot achieve what new functionality, updated programmes for investment managers reference to allow them to determine if you need to expand the scale of investment. Therefore, even if the initial design or you may need to repeatedly modified.
In short, on the one hand, the designers of the design is always subject to the restrictions of various scale of investment, on the other hand, the designer can also seek to convince investors to expand the scale of investment in order to achieve better audio and video effects and improved functionality.
Modern karaoke Hall, in the use function gradually extending, often occur Architectural Acoustics, stage, lighting, TV and audio, and other aspects of the conflicting requirements. Therefore, in the practical implementation of the engineering design process, should be determined by a variety of engineering designers of the "integrated design group" synchronization for professional design, in order to coordinate, cooperate closely in order to complete and balanced use of request, the minimal investment to be the best overall results.