The estimation of the total power field power In the audio engineering, the calculation method is completely used to quantitatively analyzes the characteristics of the speaker, the position of the placement, the electrical power of the driving speaker, and the relationship between the distribution ratio of high, medium, and low -frequency. There are some difficulties. Under normal circumstances, the designers of the system cannot obtain all the data necessary for accurate calculation. Speaker manufacturers often cannot give a complete directional special parameter for the combination speaker system. The relevant parameters of indoor sound building characteristics are generally not easy to obtain. Therefore, the actual engineering design often selects the speaker layout based on experience and general principles, and then estimates to determine the general parameters and specifications of the required speakers, and determine the position and direction of the specific placement. Sound pressure testing and actual audition, adjust the layout of the speakers, and some auxiliary audio need to be added if necessary.

1) The estimated method of the indoor sound field is based on the prerequisite of the sound field completely uniform, the sound source pointing is known and the ideal. The better these two basic conditions are met, the closer the estimated result will be reality, and the error will be greater. The basic idea estimated in the indoor sound field is that there are two parts of the acoustic pressure level of any indoor, one is the sound pressure level of the direct sound field at this point, and the other is the sound pressure level of the mixing field at this point. The actual sound pressure level of this point. The direct sound field meets the square back ratio, which can easily calculate the direct sound level of each point in the room. According to the definition of the critical distance, it can be seen that the pressure level of the sound at the critical distance is equal to the level of the sound and the sound of the sound. Therefore, if you calculate the straight sound of the critical distance, you know the reverberation of this point. Assuming that the indoor sound field (ideal) is evenly distributed, so the stunning level of the sounding sound of the indoor parts is equal to the stunning level at the critical distance. With the acoustic pressure level data of the indoor direct sound and the sound of the sound, the sound pressure level at each position of the indoor sound field can be calculated. The question that needs to be noted is that in the specific calculation, it should be converted into the distance of the speaker and the input power of the speaker, and the direct sound field sound pressure can be calculated. Generally, the total electrical power of the sound field can be estimated by the indoor sound field steady -state acoustic level.