Acoustical Investigation of Some Common Vehicle Resonators in Iran

In this research the effect of Suzuki Vitara, L90, 206T3 and 206SD Peugeot resonators were investigated to verify vehicle sound level. Experiments were done in form of 4510 factorial by complete randomize design. Type of resonators in four levels, sound amplitude in five levels (0.05, 0.15, 0.25, 0.35 and 0.45) and excited frequency in ten levels (32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 and 16384 Hz) were the factors of these experiments. Results showed that type of resonators and excited frequency had significant effects on vehicle of sound levels. Suzuki Vitara and L90 had maximum and minimum effect on decrement of vehicle sound levels, respectively.