Three-pass perforated tube muffler with perforated bulkheads

Three-pass perforated tube muffler with perforated bulkheads

Blog Article

The one-dimensional analytical approach is developed Twin Bookcase Storage Bed to predict and analyze the acoustic attenuation performance of three-pass perforated tube muffler with perforated bulkhead(s) and validated by comparing the transmission loss results from one-dimensional analytical approach and finite element method.The one-dimensional analytical approach is then used to investigate the effect of perforated bulkhead(s) on the acoustic attenuation performance of three-pass perforated tube reactive and hybrid mufflers.The results indicated that perforates on the bulkhead may change the resonant frequency of the three-pass perforated tube reactive muffler, and the resonance frequency is shifted to higher frequency with the increase in the porosity of perforation.

The sound-absorbing material filling in the middle chamber Ringette - Cages may improve the acoustic attenuation performance of the mufflers from middle to high frequencies, while the acoustic attenuation performance around the resonance frequencies is lowered somewhat; therefore, a flatter acoustic response may be formed for the hybrid muffler than the reactive muffler.