Do not think that the acceptance of public broadcasting projects is only the testing and acceptance of various indicators of the system after the completion of the project. It is in the view of Tianma Xiaobian but the acceptance of the whole process of the project, involving the rationality of the system configuration, the quality of the wire, The quality of construction is good and so. First, the system design, equipment configuration is reasonable A public broadcasting project often corresponds to the main functions and comprehensive effects of a certain site. Although the construction party (or the owner) may not be able to say the fine index parameters, his effect on the future use function is very clear. This first requires the system's designers to fully and accurately understand the owner's demands, to improve the design of the program, suitable and reliable equipment, and reasonable cost, to design a system solution that meets the needs of users. It is also necessary to demonstrate the design of the scheme. The content of the argument should include: 1 Is the system composition reasonable, and is there a better solution? 2 Select this program, its function meets the needs of use? 3 For the equipment selection, is there any unreasonable and unbalanced (there are bottlenecks), so as to avoid the system index being reduced? 4 Is the number of device configurations reasonable? Is there any problem of excessive over-provision and repeated configuration? 5 Is attention to the adequacy of reliability, including redundant backup, can emergency replacement be achieved the fastest? 6 Does the selected wire and connector meet the performance and grade requirements? 7 Whether the final cost is reasonable and so on. Through the above arguments, the rationality of the system, the realization of the use function and the optimal cost performance can be ensured to a large extent. 2. Evaluate the site of the project, especially the avoidance of architectural acoustic defects and the overall optimized acoustic design. What we finally get is the combined effect of the sound system at the site. Therefore, site factors must be considered. Through this step, we need to calculate the sound insulation, reverberation time, reverberation time frequency characteristics, sound field uniformity, etc., combined with the sound absorption, sound absorption structure, sound absorption material selection and arrangement, etc. Design the preset relevant indicator values ​​and adjust them according to national standards and technical specifications. 3. Acceptance of construction and construction and sound system installation and construction The main decoration of the building is: 1 whether the material selection meets the design requirements, 2 whether the decoration structure is consistent with the construction drawing, especially the concealed project, 3 material specifications, sound absorption materials and bulk density, sound absorption indicators meet the design standards, 4 whether the construction is standardized, Reasonable, whether the size changes, etc. Audio installation and construction, the aspects to be accepted: 1 Is the wiring reasonable? 2 Is the threading pipe and bridge frame laid according to the standard specifications? Is the 3 turns and joints reasonable and reliable, whether the grounding is reliable, whether the wire selection is reasonable, and whether the embedded parts are reasonable. , safe and reliable. Fourth, system equipment installation review and acceptance The installation of the system equipment includes the speaker, projector, screen, infrared board, camera, whether the position is reasonable, whether it is safe and secure, whether the direction and angle meet the requirements. For the installation of equipment in the cabinet, mainly check whether the equipment position is reasonable, whether the installation position is fixed, whether the wiring (signal line, power line, speaker line) is reasonable, whether the connector is reasonable, in place, the console, the position and size of the observation window. Correct, whether the line mark is complete and clear, etc. V. System work status acceptance After the above steps, the power can be turned on and the initial test, including whether the equipment is working normally, whether the function is implemented, whether the system noise floor, interference noise meets the requirements, whether the wireless microphone signal strength meets the standard, whether the mutual interference exists, etc. And subjective audition Six, test system indicators Only after the above five steps of acceptance review can we enter the test, analysis and adjustment of various indicators of the system. The items of the adjustment test are mainly 1 sound field distribution 2 sound pressure level value 3 reverberation time 4 reverberation time frequency characteristics 5 hall frequency response 6 dynamic background noise 7 speech clarity and the like. The test method and test instrument must comply with GB50371-2006 "Design Specification for Hall Sound Reinforcement System" and must be required by a third party. These six aspects are the whole process that runs through the public broadcasting project and are indispensable. It is also the only way to ensure the quality of sound engineering. This will ensure the normal use of public broadcasting projects and create a perfect public address system.
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