Reactive Silencer, Reactive Muffler, Resonance Absorber, Resonant Absorber
Reactive Silencer, Reactive Muffler, Resonance Absorber, Resonant Absorber : An expansion box for pressure waves whose size, length and cross section area, can be chosen so as to selectively attenuate at certain frequencies. The larger the area, the higher the attenuation whilst the length generally dictates the frequencies attenuated