Research on Noise Filtering Method of Fire Truck Based on Digital FIR Filter

Aiming at the interference of fire truck noise to fire fighting communication during fire fighting and emergency rescue, extracted the frequency range and main interference frequency of various noises, the noise characteristics of fire truck sound, fire truck sound and fire truck pump sound were studied by spectrum analysis. By designing digital FIR filters to reduce various noises generated by fire engines, the results show that the digital FIR filtering method can effectively filter the main interference frequencies of the noise and improve the communication quality.