Abstract
We report a sound impedance matching induced by asymmetry coupling vibrations. To achieve the vibration, acoustic waveguides with two different winding branch pipes are designed. In the acoustic device, the coupling effects of the two different winding branch pipes generate resonant vibrations, which constructs an impedance matching layer and produces a sound transmission with a wide band at lower frequencies. Importantly, multi-mode vibration can be adjusted by adding water. Consequently, the asymmetry winding branch pipes realize multi-mode vibrations that have the potential for use in sound control in broad frequencies.
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