The simple expansion chamber is a well-known design of a muffler. However, it fails to perform at frequencies that coincide with half wavelength resonances of chamber length. Acoustic black hole (ABH) has been used to control vibrations in structures. ABH is characterized by its power-law profile. This numerical work presents that when an ABH profile is used to modify a simple expansion chamber, it is observed that the zero transmission loss values are eliminated at the half wavelength resonance frequencies. Also, the ABH modified simple expansion chamber is about one-half the volume of muffler without modification. This study indicates a good potential for application of ABH in muffler design.
展开▼
