The technical terminology that learns technology of professional acoustics project to must know understanding to concern above all reachs occupation standard with relevant a few countries, only so professional design and construction ability accomplish have a definite object in view, the quality ability of the project gets assuring adequately. Can tell further, all specialized standard that concern with the project and term are the foundation that the project works, the basis that is design construction and consult, it is a center. List below a few terminology that must learn understanding seriously and standard.

Sound pressure level: The 20 times logarithm that shows actual sound presses what press with fiducial sound to compare is worth, the unit is decibel. This is its mathematical expression. Its importance depends on: Of all sound systems phonate circumstance, the acoustics quality of all enlarge sound places, need to have this index, it or a computation in retrospective design computation are fiducial.

Reverberation time: After showing the sound signal that stabilizes in is interrupted suddenly, the sound pressure level inside hall hall declines the time that 60dB place needs, the unit is a second. Its mathematical expression is as follows. Can discover, reverberation time is the parameter closely related to building illuminative structure and material. In actual project, reverberation time is hall hall more the index of main textual criticism of architectural acoustics effect.

Enlarge sound power: When pointing to the sound pressure level of rated enlarge sound that reachs systematic design, the rated power that place of enlarge sound equipment needs, the unit is made of baked clay. This parameter is in effective acoustics adjusting control not very important, but when the design in sound system and type selecting, it is acoustics index however on electroacoustic parameter reflect directly, and the final cost that it will matter to a project, so particularly important also. It is commonly in the project, it is main the rated power of * sound box will mirror.

GB GB-3947, it is the explanation of professional acoustics term term: GB GB-4959, it is the measurement technique of character of sound of hall hall enlarge; GYJ-25, it is the acoustics and characteristic index of sound system of hall hall enlarge. They are two important state levels, almost all projects are in design, construction, when checking and accept, need to regard a basis as them; GB GB/T14218-93, it is performance data of electronic air optical equipment and measurement technique; SJ2112-82, the actor that is interconnection of equipment of sound system of hall hall enlarge is chosen electric deserve to receive a value. These two standards check the effect with in checking and accept, can rise main in the type selecting of equipment and project.