Weak current College】 【professional sound reinforcement sound engineering acceptance of reference and procedures.

I. acceptance range
1, system-related functions. For example, stadium sound reinforcement project of multifunctional application characteristics; the main sound reinforcement system and fire protection public broadcasting, large-screen display, TV commentator, training room, press releases, square sound reinforcement and calling Department system linkage operation function. Multifunctional Theatre sound reinforcement system features switching characteristics; the main sound reinforcement system and fire protection, public broadcasting, stage lighting, television broadcast, program recording, films, technical rooms and internal communication system of signal switching functionality.
2. check the system installation quality and safety performance.
3. on-site sampling system acoustic performance indicators. If the audio gain, transmission frequency characteristics of sound field not uniformity and maximum sound pressure level, etc.
4. check the system for static noise. In the speakers box 2-3 m, should not be heard there is an obvious noise hum and silk.
5, play sound subjective evaluation of audio quality special program source subjective assessment.
Acoustics is the evaluation of the quality of the final sound reinforcement works. But the system's sound effects related to electro-acoustic systems and acoustic systems both reasonable. Electro-acoustic system (audio engineering) as if the road vehicles, acoustical conditions like a road, if you do not have good pavement road, performance best automobile is also difficult to achieve fast, comfortable and safe driving, just like a best performance of the speaker in the bathing Hall is difficult to play good sound effects. Therefore subjective evaluation for sound quality, you should first determine the room acoustical conditions conforms with the requirements.
System of sound effects available two "ruler", a "ruler" called objective measurement, another "ruler" called the subjective assessment of sound quality. Objective measurement of acoustical instruments are available for measurement of acoustic performance indicators, such as system transmission frequency characteristics of sound field uniformity, maximum sound pressure level, audio gain and voice intelligibility, it is characteristic of the measurement result is precise, objective and the available data to expression system for acoustic properties, but not all reflect the human ear's auditory effects, such as the sound richness and softness, luminance, layered, balance, etc. Final sound effect can also come by the ears. The results of the subjective assessment of sound quality will be more subjective, and evaluators of age, gender, professional quality, taste and playback program source, etc. larger dependencies.
Objective measurement of the acoustic characteristics of sound reinforcement system of basic requirements; subjective assessment of sound quality the final result of the auditory perception, both of which are intrinsically linked and cannot be substituted, is a complementary relationship, both indispensable a complementary relationship.
6. review all completed drawings and information accuracy, normative, set and test the credibility of the data. Consistent with data archiving and backup requirements.
Second, the acceptance procedures
Acceptance team first hear the design, construction units a brief introduction to the project and of the use of features and a description of the sound effects, the pilot identified problems and solutions. Then the scene under the scope of acceptance to the bonsai construction quality, sampling system acoustic performance indicators and subjective evaluation for sound quality. Final acceptance team and construction units and the design, construction units. Design, construction units to answer questions issues.
Acceptance process can be found in the General time limit for correction. If the engineering acceptance of unqualified (found major quality problems or poor quality sound effects and so on), and allows the design, construction units corrected for re-inspection.
Project completion within one year after acceptance, as product design, construction equipment or the quality of the system not working properly, and the design, construction unit should be responsible for taking measures to restore the system to work properly.