Full-hanging automatic set stage acoustical shell

The full-hanging automatic set stage acoustical shell is a whole new type one, which is to hang all the reflective panels including rear ones, top ones and side ones of the stage acoustical shell on the stage fly bars, so that the acoustical shell can be quickly set or retracted, so as to achieve a rapid change between natural sound performance and electric sound reinforcement performance program.

The stage acoustical shell is composed of three parts which are the rear panels, the top panels and the side panels, There are several types of the three parts to set a shell, But until now there is no kind of side panels of the acoustical shell that is hanging on the fly bars. There is usually a cart type, or a type hanging on the wings platform, which causes the side panels to be set very slowly, led to the setting of the acoustical shell is a slow process, even if it is set very efficiency, it still takes about 30 minutes, As a result, the use of the acoustical shell could not be inserted throughout the performance, and it was impossible to quickly change the scene between the electric sound reinforcement performance and the natural sound performance, because the change of the scene needed to be completed in a few minutes. Therefore, until now, the use of the traditional stage acoustical shell is set in advance in the whole performance, and then the whole scene is a natural sound performance, which has caused big limitations, because usually most of the theater stage performance are mainly based on electric sound reinforcement performance, supplemented by natural sound performance, in which the type and number of natural sound performance programs should be based on the natural sound amplification conditions of the scene, if the conditions are not ideal, the number of natural sound performance will be decreased or even be canceled. One of the most advantageous natural sound performance conditions is that the stage has a set of stage acoustical shell, As there was no the stage acoustical shell with a quick change of scenes before, the natural sound performance with small sound pressure cannot be carried out.

Therefore, the full-hanging automatic stage acoustical shell that can be quickly set and retracted provides a revolutionary innovative product for theater stage performance, which can truly meet the requirements of most theater stage performance types and create conditions for interspersed with various natural sound performance, which not only achieves the rapid change of scenes that cannot be done by traditional acoustical shell in the past, but also saves the ground space on the stage because the acoustical shell is all hanged above the stage, especially for smaller theater stages, which is very suitable.

The fold and unfold of the side panels of the stage acoustical shell is the key to affecting the time of set and retract. Because when the side panels are lift, if they cannot be folded up, they will collide with various lights and other equipment hanging on the fly bars, and this problem has not been solved before. For a long time, the side panels of traditional acoustical shell use a cart type, each panel is a cart, because the side panels are high and have a certain weight, for safety and stability, each cart has a counterweight underneath. When in use, it should be pushed to the stage from the side of the stage, and the top panels and the rear panels are built next to each other with the side panels, and when not in use, it should be pushed to the side of the stage, and the setting and putting away is a long manual operation time process, and often to scratch the floor. and the side panels also occupies a lot of stage space. The trolley type of the side panels of acoustical shell is in a wide range of use, and another type that side panels of acoustical shell hanging on the wings platform requires the wings platform to have enough space, especially the height of the platform, and needs to have a guide rail that extends from the wings platform to the center of the stage, and then unfold it after pushing it to the center, and when it is put away, it is necessary to fold and push back to the side, and the operation also takes a long time, wherein the height of the guide rail is a big problem.

The side panels of the full-hanging automatic set stage acoustical shell are hanged on the fly bars, and in the case of not using, it is lifted on the fly loft above the stage, every two pieces in a group, in a folded state, and there is a reasonable distance between the side panels and the surrounding stage lightings and other equipment on the other fly bars, and it will not lead to collide, when used, the fly bars hanging the side panels descends to a certain extent, and the folded side panels are opened automatic and are built together with the descending top panels and the rear panels to form a set of complete stage acoustical shell. The opening process uses the mechanical principle of automatic opening according to gravity, After the use is completed, the fly bars are lifted upward, and the opened side panels are gradually folded upwards to return to position, which is also a mechanical lifting method that does not use electrical devices, so as to be simple, reliable and practical.

With automatic programming, the opening or closing time of the acoustical shell can be reduced to 2 minutes and a half, respectively. Automatic programming is a particularly important one, because the retraction and release of the multi-channel acoustical shell fly bars requires very skilled operation, and the entire manual operation process is carefully optimized many times, and then the automatic programming is carried out to form a fully automatic operation mode, which is a one-key operation, which eliminates human uncertainties, saves time, effort and labor, and is safe, reliable and fast.

In addition, not only the side panels, but also the top and rear panels of the full-hanging automatic set stage acoustical shell system have more important improvements compared with the traditional method. This is due to the fact that the opening shape of the acoustical shell is the most suitable curved bell shape to better match the sound diffusion and avoid eddy currents and other factors, resulting in a stronger sound pressure output (see the video below). In this way, the stage machinery manufacturers put forward very strict requirements for the design and installation of cooperation, although the traditional roof and rear plate suspension and retraction is a relatively perfect technology, but according to the traditional hoisting mode it is still unable to achieve the shape of the curved bell mouth.

In order to create the shape of bugle and easy to facilitate adjustment, a superior mechanical design has been carried out so that the positions of the three panels, the rear panels, the side panels and the top panels of the full-hanging automatic acoustical shell are adjustable. Achieve perfect interaction with the stage machinery producers.

As a complete new and remarkable technical system, the full-hanging automatic stage acoustical shell， is sure to provide a bright future for global stage equipment in the future.

Lighting for the theater stage and auditorium

The full-scene lighting of the theater stage and the auditorium is to centrally control the stage lighting and the auditorium lighting with DMX512 signals, extending the stage lighting to the auditorium, creating a new and passionate stage environment for the interaction between the stage actors and the audience.

The traditional theater stage lighting and auditorium lighting are two independent systems, and the stage lighting is a stage lighting system based on DMX512 control, which is dedicated to stage performances. The auditorium lighting is a lighting system, which is dedicated to the lighting of the auditorium, and does not participate in the stage performance.

With the continuous improvement of the demand for performing arts, the continuous development of related science and technology, and the continuous integration of various related industries of theater design, we tried to carry out the innovative design and construction of the lighting system in the newly built theater Beijing Private Huijia School Performing Arts Center, realizing the industry's first full-scene lighting system for the theater stage and auditorium.

The lighting of the auditorium in the theater is controlled by DMX512, and the following problems need to be solved:

First of all, the lighting on the theater rooftop, to meet the needs of ordinary normal lighting before and after the performance or during the meeting, because in this state, the audience hall is very bright, the appearance of the light must be perfectly matched with the acoustic decoration of the audience hall, and it is a dual-purpose lighting and stage function, in the state of pure lighting, the color spectrum is natural light, the height of the theater is very high, the brightness needs to be very large, the projection angle is small, and it is muted, so the power is very large, there is a heat dissipation problem, this kind of light is not available in the market, it needs to be customized. In order to solve the above problems, we customized a high-power DMX512 par lamp, which does not need a fan to dissipate heat and achieve silence, and at the same time we use 6 colors of red, green, blue and white plus double yellow channels, and the use of double yellow channels is to increase the brightness of natural light when pure lighting is used. Due to the large volume of the lamp, the appearance is not good-looking, based on the above considerations, for the acoustic decoration, we have adopted a small distribution group of the top of the auditorium acoustical reflectors layout, leaving a gap between the acoustical reflectors, and hiding the large top lighting in the gap of the acoustical reflectors, which can only let the light beam shine out.

The second is the selection and layout of other lights in the auditorium. In addition to the lights on the rooftop, there are also lights on the walls, lights on the top of the first floor, and lights on the overhangs of the second floor. The wall lighting includes the left and right walls and the back wall, and uses 3-inch crystal downlights. The top of the first floor is lit with 5-inch frosted glass downlights, and the eaves on the second floor are self-made rectangular lights. All of these lighting address codes are single light single numbers, and together with the headlights at the top, the spacing between the up, down, left, right, front and back is the same, which is convenient for the gaffer to compile a rich scene.

The above four lights are static lights, in order to improve the effect, we set up 8 electric tracks in the speaker room at the left and right ends of the stage, and installed 8 computer lights, 4 on the left and right. These 8 computer lights can shine on the big roof of the auditorium, bringing a more perfect dynamic lighting scene effect to the auditorium.

Multifunctional auditorium design example

The multi-purpose auditorium is mainly used in schools and other non-professional performance units, for the sake of economy, it must be made into a multi-purpose hall, and its design includes a comprehensive consideration of many factors, including architecture, decoration, optional application projects, including performances, conferences, cinemas, etc.

We take the latest production of the Beijing Private Huijia School Performing Arts Center as an example to introduce the whole process of design and construction of a functional auditorium for performances, conferences, and cinemas. This process is based on the architectural design of existing architectural design institutes.

The first is the selection of design tools, which is very important for the communication with Party A the costumer's real needs, Party B's professional communication, etc., and the appropriate design tools can save Party A the costumer a lot of time and money. Because an auditorium is a comprehensive application of multi-level and multi-professional construction and equipment in three-dimensional space, what is finally reflected in front of Party A is a comprehensive visual and auditory multi-project multi-functional scene. It is important and necessary to be able to pre-represent these scenarios to Party A. This kind of pre-scene performance is a process of gradual communication and improvement, which requires the designer to efficiently modify and adjust according to the requirements of Party A's continuous adjustment and improvement with reference to Party B's professional conditions, so that Party A can clearly understand the value and cost performance of the project at any time. To do this, we need to use BIM (Building Information Modeling) tools. Although there are many BIM software, but it is not widely used, considering this practical situation, we have simplified the complexity and selected the most commonly used tools based on CAD, 3D modeling using SketchUp, image or video rendering using the plug-in Enscape. According to such a simple combination of tools, part or all of the effect video scenes of the auditorium at all stages of construction can be made at any time, which is not only convenient for communication with Party A, but also convenient for communication with the construction unit, so as to achieve a good use effect. Because we are not BIM for BIM's sake, it is easy and the fastest way to do BIM according to the concept of BIM under existing conditions.

With the right tools, designers should be able to comprehensively understand the knowledge of architecture, decoration and sound and light and use them flexibly. The first is to determine the needs with Party A according to the building structure of the design institute. The original structure of the theater of Huijia Performing Arts Center was designed with a space above the stage machinery and a lifting orchestra pit under the stage. In the end, the function of electric sound reinforcement, natural sound performance, stage lighting, conference sound reinforcement, and cinema is needed.

The auditorium and stage area can be carried out independently for the most part.

The design of the stage area is relatively simple, because the stage walls are all painted black, and the decoration is basically not considered. The decoration effect of the auditorium is very important, so the design of the auditorium is the most complex.

In the design process, we start from the top down. Because it is a two-story auditorium and the upper space is shorter, the finished surface of the ceiling decoration should be improved as much as possible.

As shown in the photo above, there are 6 beams and 7 beam sockets at the top. We made the horse track as shown in the two renderings below, and installed the acoustic panels. The middle transverse horse track is located higher and has different heights, taking advantage of the height of the beam nest, so that people can walk in it. The left and right sides and the front of the horse road are used as the main horse lanes and are located in a lower position. However, it will not affect the sight of the audience on the second floor, and the control room on the second floor should be relatively high, so that the projector lens should be more than 2.2 meters away from the ground of the last row of audiences, so as to avoid the strong laser light source from damaging the eyes of naughty students. At the same time, you should also be able to see the LED monogram screen above the stage entrance, and you can also see the lifting orchestra pit below the stage entrance.

We use a number of small pieces of decentralized design on the top of the anti-acoustic board, the benefits of this are many, first of all, the sprinkler head of the fire can be installed in the vertical gap of the anti-acoustic board, and then we use the stage and the audience hall full-scene lighting, the lights of the big roof can also be hidden in the vertical gap of the anti-acoustic board, the sky effect speaker of the cinema can also be hidden in the gap, because the gap can not be too large, so the speaker needs to be customized ultra-thin. In addition, the anti-acoustic board is made into small pieces, and the weight of each anti-acoustic plate is very small, so that the load of the top structure can be evenly distributed and the safety can be improved.

The branch on the top of the horse road is convenient for the installation and maintenance of various equipment such as fire HVAC, lighting, monitoring, emergency lighting, distribution box, etc., especially can install a lot of water pipes, air ducts, bridges, and various strong and weak current cables and wires that are connected to the entire theater stage area and the audience. Using 3D software to assist in design, you can clearly find all kinds of collisions that may occur, and the construction unit can easily communicate with the construction according to our CAD drawings. See below for our animations.

However, the use of small acoustic panel design also has the disadvantage that the exhaust air duct can not be completely closed on the top due to the large pipe cross-section, and must be well soundproofed, otherwise when using electric sound reinforcement, the subwoofer vibration will cause the pipe to vibrate.

Because the auditorium area is small, in order to save space, the slap light group is surface-mounted and installed on the light stand, the surface-mounted light stand adopts the electric lifting type, and the winch is installed on the horse road.

Two curved ear rooms are made of steel structure at both ends of the stage, the upper half is placed with a line array and a subwoofer, and the lower half is made of two curved LED auxiliary screens. There is an electric frame that can be automatically stretched out on the side of the ear room by the stage mouth, which can be installed with 4 pairs of computer lights and 1 pair of monitors, which are matched with 2 monitors on the table, compared with the monitors placed on the table, to avoid reflection distortion, and at the same time, the sound is emitted from above, making the actors more passionate.

In order to maintain the cleanliness of the back wall and the ease of operation, the control room on the second floor and the chasing light room on both sides use electric lifting glass, of which the control room in the middle uses three lifting glasses, and the middle one is for the light of the movie projector lens.

For the cinema system, we used an 11.1-channel Dolby Atmos system, see the system diagram. All speakers are hidden. And it is arranged according to the layered layout of the auditorium.

It is very important to note that the center channel speaker is mounted behind the frame of the screen, rising and falling with the frame. The screen is an acoustic curtain.

Movie projectors do not have keystone correction, this is because the installation position of the projector can not be too low, most movie theaters use the method of cutting edges on both sides of the trapezoidal picture, in fact, the picture of these movie theaters is eventually trapezoidal distortion. To do this, we first process the movie video signal through the video processor and perform keystone correction, so that there will be no loss of pixels and distortion of the picture. This server is shared with the LED screen. At the same time, it can also control four LED screens, which saves the space during operation and facilitates the centralized management of video programs.

The stage acoustic cover is not only coordinated with the stage, but also the overall appearance and lighting are also unified with the audience hall to achieve a perfect overall effect.

Natural sound performance is the key to the design, in addition to the full suspension of the automatic retract of the acoustic cover, we also have a unique design for the lifting orchestra pit, because the entire theater area is not large, the depth is only more than 20 meters, so even in the absence of electric reinforcement, the sound pressure of the band in the lifting orchestra pit is enough, in order to make the sound of the band can be transmitted to the audience with higher quality, we have changed the usual practice of the guardrail of the lifting orchestra pit, which is usually made closed, and the front should be sealed with a wooden board to block the audience's sight. The audience is not allowed to see the inside of the orchestra pit, and then the microphone is used to pick up the sound and then amplify it and broadcast it through the speaker. We made the railing of the orchestra pit decorated with steel mesh and covered with sponge, which can block the audience's sight, and at the same time ensure that the sound of the instrument can be transmitted to the audience more transparently, reducing refraction distortion, and there is no need for electric sound reinforcement, forming a perfect match with the singers in the anti-sound cover.

Subwoofer Room Corrector Instructions

1, Connect the subwoofer room corrector in series between the subwoofer source and the subwoofer , as shown in the figure below.

For the specific wiring diagram, see the input and output interface mark on the back panel below.

2. Turn on the power supply of the corrector, enter the length, width and height of the room through the size input button, and the input digital is displayed on the LCD screen, as shown in the figure below on the corrector front panel, and press the OK key after entering the size.

After completing the above operations, it can be used. Compared with the unused corrector, the subwoofer usually has a significant improvement in effect, and you can feel the low frequency relaxation, layered, and powerful.

3.If the effect is not obvious, please first check the full-range speakers in the audio system, whether their low frequency is lower or not? To debug the low frequency to not less than 80Hz, usually the subwoofer is used for the theater system, you can debug through the theater amplifier's pre-menu, all speakers except the subwoofer, the low frequency is adjusted to 80Hz. Let all the low frequencies below 80Hz sound the subwoofer through the corrector.

4.After the subwoofer is corrected by the corrector, because the sound pressure of the standing wave is greatly reduced, the overall sound pressure of the corrected subwoofer will be significantly reduced, and the input level of the subwoofer can be increased.

5. If you want to make more detailed adjustments for the environmental differences in different rooms, you can connect the computer through the USB interface on the back panel for debugging, and we will provide professional debugging software. This item is only for professional video service providers, not for individual users.

Overview of the principle of subwoofer room corrector, in small and medium-sized rooms using subwoofer, the low frequency and ultra-low frequency heard by the human ear is the sound waves emitted by the subwoofer and the room wall, the ground, between the top and other items in the room reflected sound wave superimposed sound wave results, for the vast majority of the use of subwoofer small and medium-sized room, usually cuboid, which room between the three opposite sides (such as the roof surface and the ground) caused by the reflected sound wave (that is, sound wave resonance) strength is the largest, the size of the three opposite sides (length, width and height) are about 3 meters to 8 meters. In this size range, the standing wave frequency point is between 20 Hz and 60 Hz. This is well within the frequency response range of most subwoofers. The sound pressure intensity of low-frequency standing wave is usually much stronger than the sound pressure of other non-standing wave frequencies, so that the human ear's perception of subwoofer sound waves that have not been corrected by the room is usually mostly from the sound of three fixed standing wave frequencies, which is a very blunt and monotonous feeling, because the level of other non-standing waves is relatively weak and suppressed by standing waves, which is the most critical factor that needs to be corrected. In particular, most of the three opposite sides of the small and medium-sized room, the height of the ground and the top surface is the smallest, the standing wave frequency generated by this opposite side is the highest, and the area of this opposite side is the largest, the sound pressure is the strongest, and it will make people feel that the subwoofer frequency is very high and can not sink. Especially when the room size is relatively small, the standing wave frequency is higher and the effect is worse, which makes most people think that the subwoofer cannot show ultra-low frequency in a small room. Subwoofer room corrector, in accordance with the theoretical basis of electroacoustic technology science, powerful supporting DSP circuit design, provides the solution to the above low-frequency standing wave problem, mainly adjust the parameters of the standing wave frequency point, with other frequency bands to achieve balance, product operation is simple, the effect is obvious, so that people can enjoy the pleasure of high-fidelity sound wave reduction after subwoofer room correction

Terms of Service

Tianjin New Era Audio and Video Co., Ltd. has been committed to the continuous innovative design and application of professional stage art and civil audio and video for more than 30 years, and its level has reached the leading hight. In order to support our high-quality products and services, we have formulated the following corresponding service terms:

1》For the advanced full hanging automatic set acoustical shells project with multiple patents, we can provide comprehensive engineering services from design to construction, and provide patent use authorization. We are willing to allow the principal to visit our completed project, Beijing Private Huijia School Performing Arts Center Automatic Acoustical shells, and can communicate with the relevant departments of Beijing Private Huijia School to understand the situation. For any new project, for stage mechanical construction units with professional construction capabilities and wishing to carry out construction themselves, we can grant patent rights and complete the entire construction process under our design and guidance. For any infringement of the patent rights of the full hanging automatic set acoustical shells, we will pursue legal responsibility.

2》 The Subwoofer room corrector device, a simple and efficient product mainly targeting home use to handle room low-frequency standing waves, is currently awaiting the approval of related patents and will soon be launched. Under the condition of ensuring all safety certifications, we will guarantee the immediate effect of the product function, and if the effect is not achieved, we will unconditionally refund the money. We also declare that for any infringement of the patent rights of the low-frequency room correction device, we will pursue legal responsibility.

3》 For the projects we have design and construction examples of, theater stage and audience seating full scene lighting, multi-function auditorium design and construction, we can provide comprehensive services from design to construction. The services can be provided separately. The specific situation can be discussed with the principal through consultation.

Among them, the innovative theater audience hall and stage lighting integration design has achieved the use of DMX512 lighting in the audience hall, which requires perfect coordination with the audience hall decoration, especially the top design. This is the crystallization of our many years of stage art technology and decoration design knowledge and experience. The completion of this project requires perfect coordination and cooperation with all relevant units from start to finish.

4》To make the design and construction process of the entire engineering project simpler, more reliable, and more effective, we are constantly striving to improve our communication efficiency. We also continuously strive to improve our design tools. For the three-dimensional spatial model of the stage, at present, we use the BIM (Building Information Modeling) method, in addition to the necessary CAD software for communication with all parties, we also use three-dimensional modeling software and three-dimensional rendering software from the beginning of the communication design process to the completion of the project. We provide the parties with high-efficiency visual three-dimensional scene models, rendering pictures, video animation demonstrations, etc. This method greatly improves communication efficiency and greatly reduces the costs of all parties. It enables customers to spend less money and do more, using the most advanced products and services, which is our consistent goal. If you have any questions, please feel free to contact us at any time. We look forward to providing you with the most satisfactory products and services.