Weak current College】 【professional audio engineering sound field design steps and features.

<br> A professional audio works of important work is the sound field design, works for the ultimate quality, sound field design is also a key point. The purpose of sound field design lies: the use of scientific computing do guidance, for audio equipment .to build an ideal sound space, the device performance fully. In a small number of strict construction decoration and design, generally to make the necessary sound field design, but in order to standardize and follow the steps for professional audio engineering work, eliminate any irrational .factors, for the following other design guidance, it is necessary to carry out the design of the sound field. <br> <br> Sound processing - this is the sound field design is the first step, but also many technicians easy to ignore .the steps. The purpose of sound insulation is in a specific area within the creation of a project are not subject to external influence or impact on the outside of the quiet sound field. It includes external sound reinforcement of sound insulation, sound insulation between rooms, .soundproof walls, are part of the Windows and doors and ceiling. First of all to look at and outside noise, this task is not to let outside noise incoming indoor or indoor voice to the outside. This work, it is necessary for building design and .construction units to the architectural structure of the consultation of sound insulation, further you can learn more about the environmental sector. The concrete implementation, outside noise transmission such as indoor Interior you can to control the total noise is usually higher for practical sound engineering requirements in .the following 35-40dB; indoor voice to the outside world can look on the outside of the environmental impact, in accordance with the provisions of the environmental sector, generally not higher than the average 10-15dB for good. <br> <br> .Practical engineering needs to address parts of the walls, doors and Windows and is ceiling several places. Usually the Auditorium and the outside of the wall most can meet general sound engineering, but if the sound system of the sound pressure level is relatively large, working .time more at night, you should let the construction sector to consider increasing the thickness of the walls; Windows and doors is an important part of sound insulation, often a small window to improper handling, resulting in the sound insulation failed, general attention to: .1. try not to let the door gap, experiencing frequent switching and indoor and outdoor sound are relatively large, you might consider setting the sound isolation channel structure, this is it. 2. to increase the window structure and material thickness, if necessary, .you can use leather door and double-glazed Windows. 3. If the sound effects need better hang on doors and Windows, in the heavy curtains and shutters are more economically viable way. The sound insulation of the ceiling is also not be neglected, especially .the roof is not a concrete structure, instead of using scaffolding structure, the ceiling of acoustic leak is more serious, you need to install the ceiling of the material and the quality is high, if you need to take into account the increase in the ceiling .barrier or the ceiling laying versamat approach to meet the requirements of sound insulation. <br> <br> Second is the sound insulation between rooms, its task is to make room in the audio system when mutual interference to a minimum. Although the various standards .and regulations on this index is not required, but the quality of the audio engineering has a significant effect. Practical engineering needs to handle parts or walls, doors and Windows and ceiling, but processing requirements different from before. General indoor certain thickness of the concrete .or brick wall acoustic requirements or to be able to meet, it's important to note that some of the extra room dividers, they usually use a simple light steel keel fill a certain amount of fire-absorbing asbestos method, this is for the sound engineering is .absolutely not enough, this is the case, you need sound designers to make architectural decoration units, for example, the solution can be used following this increase casing solutions. But for high power bass of isolation is not used to resolve the thick brick wall; .sound insulation of doors and Windows are not ignored, particularly pay attention to the quality of the production of doors and Windows, because a lot of sound interference are derived from the poor quality of doors and Windows of the slit, of course, necessary, or .you can consider using hanging curtains and shutters approach to sound; sound insulation of the ceiling in the room sound insulation between rooms, but more importantly, we can look at this common casino room layout diagram, you can find the Hall ceiling above space is at .the top of the surrounding box is connected, so that in the Hall for entertainment or performance, we have an impact on the balcony, it must be sound on the ceiling. <br> <br> Generally speaking we can lobby ceiling and balcony at .the top of the add another layer of sound-absorbing panels for insulating layers, or in the ceiling on coverage of certain thickness of fire protection sound absorbing mineral wool for sound insulation. On-site noise reduced - in most practical professional audio engineering, .air conditioning and ventilation, are some of the equipment to be installed, these devices work noise will to a certain extent affect the quality of the sound field, so there should be at design time for a solution. Air conditioning and ventilation equipment is the best .choice for low noise, stable product, as far as possible, so that when you install air conditioning compressor away from doors and Windows, fan power a loud noise is difficult to control, you can use the fan installed in the duct inner structure, as .shown in the following figure. <br> <br> Implementation of a sound field uniformity - sound field uniformity of requirements throughout the public areas, the average sound pressure value deviation to a small extent, General requirements in the following 10-12dB, .otherwise it will cause uneven sound field, reflected on the local sound pressure, some local and small, to feel very bad. In a real project in architectural structure and sound system layout for acoustic field uniformity. In building structures, should be avoided as far .as sound reinforcement area larger column, avoid large concave-shaped structure, building decoration, to try to make the entire range of decorative structure and basic materials, particularly given the limited funds, walls with cement la hair structure is a good way to achieve sound .field uniformity, of course, if you would like a decorative design as computed by the concert for a variety of different diffuser, save money and be able to achieve very good results; the layout of the audio system can be largely solved sound field uneven, .in General, long narrow Hall sound reinforcement must sound reinforcement area to expand along the long side, as shown in the following figure, space higher sound reinforcement occasions to try to toneBox location elevation, preferably slightly tilted backward field, as shown in the figure below ., if you are in space and space is a large place for sound reinforcement, they should consider speaker set arc formation hoisted into uniform sound diffusion. Visible sound system layout can solve sound field does not have the problem, if strict sound field, you can .also use sound box manufacturers to provide sound field design software for simulation and remediation, of course, the best approach or in the construction of architectural decoration design as far as possible, so that when the sound field with uniform. <br> <br> .Sound field flaw avoid - in many audio engineering have varying degrees of sound field flaw, audio highlights, audio chatter, audio feedback, voice resonance, these issues are brought to the acoustic field flaw, and these defects caused by problems in the practical use .is very difficult to resolve. For example, the acoustic field feedback and resonance occurs on the system does not work. Effectively address them, the best time is in the design and construction of architectural decoration. Usually we can consider the following aspects, 1. .try not to sound reinforcement locale large glossy concave structure, including the roof and walls, particularly on the stage to taboo, if compelled, in front of the concave side hung heavy cord or placed objects, this sound is not likely to occur in focus, .2. try not to sound pressure larger area set two parallel reflection strong walls, especially when the sound reinforcement area Strip also to note that this can effectively avoid shaking the fibrillation, 3. General comparison as long as the sound field, there is no sound .focused evenly, not sound reinforcement-gain sound feedback when you are not likely to occur, we can also take advantage of the system layout and Equalizer Spectrum Analyzer to correct, so that actual use is even not happen acoustic feedback, 4. voices of resonance .and decoration material and construction are closely related, it is important to avoid sound reinforcement locale larger cavity volume, certain requirements for special decoration technology of reasonable, don't let loose material connection, such as: gypsum ceiling if not pad is installed in the .aluminum frame, a major public address sound pressure, prone to resonance, particularly the low-frequency signal resonant certainly occurs frequently. <br> <br> Calculation of the reverberation time - on sound field of all specifications, the most familiar is the .reverberation time, it is also easier to control in the design of the measurements. If the design of control correctly, a sound field effect performance is outstanding, the sound will be mellow, full, not excessively bureaucratic, not dry. Reverberation time control of .the key is: use the appropriate calculation, guiding the setting of decorative structure and material selection, so you can reach the reverberation time target value. For different types of sound engineering, reverberation time requirements vary with the type of project, different sound field size ., the reverberation time indicators differ in design we can refer to the chart below to determine the value of the reverberation time, it is based on project type and the size of the volume of sound reinforcement area to the given the reverberation time, close to the .recommended value range, sound field will achieve better results. Here also should be noted that: there is now a lot of designers will set the value of the reverberation time is smaller, then use the device in the reverb to increase sound reverberation time, doing .so not only does produce youmei natural reverberation effect, and to some extent undermined the original recording signals in a direct-to-acoustic signal is not desirable. <br> <br> General engineering calculation formulas are used in the following two formulas below is .the contents of a various parameters, in general we can 500Hz and two local computing 1000Hz acoustic reverberation time. We evaluated all the on-site materials broadly identified and statistics better their respective area, from the construction manuals or product brochures, respectively, to access .their 500Hz and sound absorption coefficient of 1000Hz, you can calculate the average of the acoustic field sound absorption coefficient, area, volume, sound energy coefficient and the average absorption coefficient calculation takes the field at the time of 1000Hz 500Hz and reverberation time, if the .calculation results and recommended reverberation time values are relatively large gap, and decorative units to reduce or replace a consultation with some materials, and then evaluated until satisfactory, in calculations must be building materials of the area and the sound absorption coefficient statistics correctly, especially some .perforated acoustic Board, perforation rate disparities of different sound absorption coefficient, to influence the final result is also larger. In addition, performed works, the calculation of the reverberation time also the empty field, and the audience applause of all time. Sound pressure level .calculated - sound pressure level is a professional audio system, an important indicator, a reasonable scientific sound pressure level of the sound field effect, equipment selection, actual operations have a significant role, but also for making good listening environment created good conditions. < .br> <br> The sound pressure level calculated before, also have to determine an appropriate environment suitable reference sound pressure level, and the reference sound pressure level and the project type also has a close contact. Determine baseline sound pressure level, but also look .at the normal human auditory sense curve, we can find in different frequency, people on the same sound pressure level of perception of sound is not the same, this perception in professionally known as loudness, unit is Phono, with this measure of value, we .can according to actual project type, according to their frequency of sound reinforcement signal characteristics, you can determine a suitable reference sound pressure level. Usually for music playback-based system, take the 85-90dB, for consisting mainly of sound reinforcement system can take .70-80dB, plus 12-18dB peak levels, plus 1-3dB of environmental noise margin, you can get an average rating of listening location sound pressure level. The sound pressure level is the system you want to average listening distance needed to achieve the .sound pressure level, then the sound pressure level and how to convert to the device itself rated sound pressure? this requires a sound propagation of sound pressure level change map, we can see, we require that the average distance from the listening of sound pressure level .in this position, but the device itself rated sound pressure level is here, when you need to calculate a formula for this kind of sound pressure level, so that finally the sound pressure level calculated isSpeakers at its premises need reach 1m sound pressure level, it .is followed by electrical calculations and equipment selection basis. <br> <br> Through sound field design we can find: professional audio engineering of the sound field design content more results on project quality, equipment selection and system of work is very important. Specific .needs in the design, construction and decoration elements involved or more, some still in close contact, visible sound engineering in the design of the start of construction or decoration unit needs to be closely coordinated with, so we need to get help as soon as possible ., as soon as possible in the design, so as to achieve better results. <br> <br> <br> <br> <br> <br> <br>.