After two-grade demarcate, the A/B/C sound pressure level, the gross sound pressure level and the sound power level are produced with the application of A, B, C level fuzzy net.

• 通过二级标定，引入A、B、C三档模糊计权网络，生成A、B、C三档声级及总声级，求取声功率级，进而依据三段评判对噪声进行进一步的评判。