Helmholtz damper has reflective and damping adjusting devices for changing natural frequency of resonance space by varying reflective element spacing and damping of Helmholtz resonance by varying damping element distance

摘要

The damper (10) has a reflective element adjusting device for adjusting a reflection unit spacing between an opening (22) and a reflective element (14). The reflective element adjusting device changes natural frequency of a resonance space (12) by varying the reflective element spacing. A damping element adjusting device is arranged for adjusting a damping element distance between the opening and a damping element. The damping element adjusting device changes damping of Helmholtz resonance by varying the damping element distance. An independent claim is also included for a method for adapting a Helmholtz damper.