Support system for a sound converter
By adopting a detachable connection device and a height-adjustable support system in the sound converter module, the diffraction effect and position error problems caused by excessive distance between modules are solved, and stable support and accurate signal of a large two-dimensional sound conversion surface is achieved. Propagation ensures the directionality of the system and the accuracy of the reproduction range.
Patent Information
- Application Number
- CN202380039550.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-09
- Filing Date
- 2023-05-09
- Publication Date
- 2024-12-27
AI Technical Summary
When building a large two-dimensional sound conversion surface, existing sound converter modules face problems such as diffraction effect and position error caused by excessive distance between modules, resulting in side lobes and frequency response changes, which affect the directionality and reproduction range of the system.
Using removable connection devices and height-adjustable upright or suspension support systems, the precise positioning and stable connection of modules is achieved through mirror-built lateral elements and movable latches, ensuring the tight fit between each module and the dimensional stability of the system. .
It realizes stable support on the large two-dimensional sound conversion surface, reduces the generation of side lobes and changes in frequency response, ensures the precise alignment of the system and the suspension of the center of gravity, improves the accuracy of signal propagation and the effect of beamforming.
Smart Images
Figure CN119213789A_ABST
Abstract
Description
[0001] The present invention relates to a support system for sound transducers, in particular for constructing sound transducer surfaces. It can be used as an upright or suspended system, and is particularly suitable for planar two-dimensional sound transducer devices constructed from speaker modules.
[0002] Such modular devices are usually controlled according to the principle of wave field synthesis and can generate one or more sound wave fronts that are independently controllable in the azimuth and elevation planes and whose direction and angle can be adjusted separately. The loudspeaker modules do not need to be mechanically aligned like a line array. The control is achieved via discrete control levels and delay times of a large number of transducers.
[0003] A support system is described with which a flat sound conversion surface can be built up from individual modules. This construction places special demands on the fastening system. On the one hand, the transducer surface must not be interrupted by large areas in which no transducer contributes to the generation of the wavefront. Too large a distance between the modules can lead to diffraction effects and thus to unwanted side lobes outside the programmed directivity of the system.
[0004] The maximum size of the sound-generating surface is limited in the vertical direction only by the mechanical load-bearing capacity of the materials used; in the horizontal plane, the system can be expanded as required. The increase in size places special demands on the accuracy of the positioning of the individual modules, since the errors increase with the number of modules. However, in order to calculate the time it takes for the signal to propagate to each individual transducer, the exact position of each individual transducer is crucial. Even a difference of only a few millimeters between the calculated position and the actual acoustic center of the individual transducer can result in a frequency response that varies depending on the position.
[0005] The object of the present invention is therefore to provide a stable support system for a sound conversion module, with which large two-dimensional sound conversion surfaces can be constructed without tolerances due to the increase in system size, which would lead to errors in the reproduction range. The system can also be used for beamforming applications that are constructed as two-dimensional radiator surfaces. In the following, the use of Figures 1 to 4 The schematic diagram in is used as an example to describe the structure.
[0006] Figure 1 The structure of a two-dimensional sound conversion surface is shown, consisting of two modules 100 and two modules 101. In the following, starting from the view of the front side, the left side and the right side are described.
[0007] The front dimensions of modules 100 and 101 are identical. But in practice, not every module in wave field synthesis is equipped with a subwoofer. In the example, only module 100 has an additional transducer for the bass range. It is therefore deeper than module 101.
[0008] The support system has a transverse element (201) which is designed in a mirrored (i.e. different) manner. It is used to tighten on the left side of each module and (202) is used to tighten on the right side of each module, and has two panels (203) between which an adjustment device (i.e. variable mechanism) consisting of elements (301) to (500) enables a detachable connection of the modules. The adjustment device can be used in particular to move the modules in or against the viewing direction (i.e. backwards).
[0009] The mounting system is designed so that both types of modules 100 and 101 can be mounted anywhere within the overall structure. It is also possible to mount type 100 modules in reverse, i.e. with their radiating side facing backwards. This design is very advantageous for individual modules in very large systems in order to achieve a cardioid directivity for the entire system, even in the bass range. However, it is also possible to create a support system with a smaller mounting depth if only type 101 modules are used.
[0010] The system can be suspended on a truss 200. However, an upright structure is also possible. For this purpose, the upright feet are suspended on connecting bolts 403 on the floor, so that the load is evenly distributed. If they are designed to be height-adjustable, a precise alignment of the system can be ensured. A tall upright system can be secured against tilting towards the truss 200. The truss 200 has a plurality of holes for fastening, so that the system can always be suspended at the center of gravity, depending on the installation with more or less deep modules.
[0011] Figure 2 The connection mechanism is shown when it is screwed to the right side of each module. The left-hand fasteners are all built in a mirror image. The vertical connection of the module to the column is achieved via a movable latch 401 as part of the adjustment device. It is embedded between two outer panels (203) and can be moved along two guide pins. In the closed state, it hooks into the connection bolt 403 connected to the module located above. The sliding lever 302 is then in the closed position, as shown in the schematic diagram. The relative position of the system connected to the column is then fixed against each other in all directions. If there is a risk that the guide bolts 405 cannot absorb the vertical forces when erecting high module columns, force-absorbing rails 402 can be provided for larger systems. The optional horizontal connection of the module columns using connection elements 500 can increase the dimensional stability of the system. Shown here is the closed state, in which the pins hook into the adjacent right-hand module. However, other possibilities for connecting the panels horizontally using clamps, screws or hooks can also be envisaged.
[0012] Figure 3The open position of the connecting element is shown. The fixed lever 301 is pressed from the front to open the vertical connection. This causes the sliding lever 302 to be lifted, which causes the movable latch 401 to move into a position where the upper module can be lifted by its connecting bolt 403. In its upper position, the horizontal connecting element (500) releases the horizontal connection with the adjacent module.
[0013] Figure 4 A side view of the closed connection is shown. The sliding lever 302 holds the movable latch 401 in its forward position until the fixed lever 301 is depressed, as shown. The pivot point 410 of the sliding latch 302 is located slightly above the sliding bolt 409. Thus, the tension spring 404 holds the lever in its position so that a force first needs to be applied to release the sliding lever before the spring 404 supports the lifting of the sliding lever 302.
[0014] Furthermore, the closed position of the sliding lever (302) is secured by a safety hook (406). It engages with a groove in the sliding lever (302) so that it cannot be lifted. Only when the color-coded securing lever (301) is pressed does the safety hook (406) rotate around its pivot point (407) to such an extent that it releases the groove in the sliding lever (302) to separate the modules, overcoming the force of the weak tension spring of the safety hook (408). Thus, the system is doubly protected by the tension spring (404) and the safety hook (406) against accidental opening of the vertical module connection. Reference numerals
[0015] 100 Module with mid-range and high-frequency converter and subwoofer
[0016] 101 Module with IF and HF converter
[0017] 200 Trusses for suspension systems
[0018] 201 Left connecting element consisting of two steel plates and a connecting mechanism between them
[0019] 202 Right connecting element consisting of two steel plates and a connecting mechanism between them
[0020] 203 Outer Panel
[0021] 301 Fixed joystick
[0022] 302 Slide joystick
[0023] 401 Removable Latch
[0024] 402 Rails for force absorption
[0025] 403 Connecting bolt
[0026] 404 tension spring
[0027] 405 Guide Bolt
[0028] 406 Safety Hook
[0029] 407 Pivot point of the safety hook
[0030] 408 Tension spring for safety hook
[0031] 409 Sliding Bolt
[0032] 410 Pivot point of the safety hook
[0033] 500 Horizontal connection element
Claims
1. A support system having a connection element (201) for tightening on the left-hand side of a sound converter module and a connection element (202) for tightening on the right-hand side of the sound converter module, Features The connection elements each comprise two outer panels (203), between which adjustment means, in particular adjustment means for horizontal displacement, implement a releasable connection of the module to the elements (301) to (500), wherein the support system is suitable for connecting a large number of loudspeaker modules to a flat baffle.
2. The support system according to claim 1 having a connecting element (201) for tightening on the left-hand side of the sound converter module and the connecting element (202) for tightening on the right-hand side of the sound converter module, Features It is also possible to mount the (100) type modules in reverse, i.e. with their radiating side facing backwards, which is very advantageous when setting up large systems in order to achieve a cardioid directivity of the entire system even in the bass range.
3. The support system according to claim 1 or 2, having a connecting element (201) for tightening on the left-hand side of the sound converter module and the connecting element (202) for tightening on the right-hand side of the sound converter module, Features The support system can accommodate modules of varying depths if appropriate fastening holes are provided in it.
4. Support system according to any of the preceding claims, having a connecting element (201) for tightening on the left-hand side of the sound converter module and the connecting element (202) for tightening on the right-hand side of the sound converter module, Features The vertical connection to the module column is achieved via a movable latch (401) embedded between the two outer panels (203) and movable along two guide bolts (405), wherein in the closed state it hooks into the bolts (403) connected to the module located above.
5. Support system according to any of the preceding claims, having a connecting element (201) for tightening on the left-hand side of the sound converter module and the connecting element (202) for tightening on the right-hand side of the sound converter module, Features Optional horizontal connection of the module columns by means of joysticks (500) or other connection options can increase the dimensional stability of the system.
6. Support system according to any of the preceding claims, having a connecting element (201) for tightening on the left-hand side of the sound converter module and the connecting element (202) for tightening on the right-hand side of the sound converter module, Features The pivot point of the safety hook (410) is located slightly above the center of the sliding bolt (409), whereby the tension spring (404) fixes the sliding lever (302) in its closed position, so that before the tension spring (404) supports the lifting of the sliding lever (302), a force needs to be applied first to release the sliding lever.
7. Support system according to any of the preceding claims, having a connecting element (201) for tightening on the left-hand side of the sound converter module and the connecting element (202) for tightening on the right-hand side of the sound converter module, Features The closed position of the sliding lever (302) is secured by a safety hook (406) which engages in a groove in the sliding lever (302) in such a way that the sliding lever cannot be lifted until the pressure on the fixed lever (301) overcomes the force of the weak tension spring of the safety hook (408) and rotates the safety hook (406) to such an extent that it releases the groove in the sliding lever (302) to separate the modules.