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A Time Weighting Algorithm of Sound Pressure Level Based on DSP

A model for calculating time weighting sound pressure level is proposed in real- time based on DSP and researches on how to modify weighing coefficient is made. An algorithm of the model is designed. Simulation of processing classic signals with this algorithm is conducted. The result shows that this algorithm produces error no more than 0. 001 d B for calculating sound signal's time weighting sound pressure level,therefore it is significant for calculating time weighting variables of acoustics and related engineering field.