摘要 |
A synthetic jet muffler (200) includes an exit end (210), a propagation path (215) for conducting a first sound wave (220) emitted by a synthetic jet generator (225) to the exit end (210), and a shroud (240) for conducting a second sound wave (245) emitted from the synthetic jet generator (225) in a direction opposite to the first sound wave (220) to the exit end (210), wherein the shroud (240) is disposed so that the first and second sound waves (220, 245) travel different distances to effect noise cancellation at the exit end (210). |