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Attenuation and frequency response of coupled tubular-shaped sonic crystal with various slit position and axis orientation angle has been analyzed through an experimental approach. The test specimens model is constructed by two cylindrical-shaped resonators with different diameter d1 and d2. Both resonators coupled in a certain configuration with inter-axis distance (d1<a<d2) to form multi-local...
This study focused on the use of coupled multi-degree of freedom Helmholtz resonator inclusion for improving sound absorption of wooden sound diffuser element. Tubular shaped sound diffuser element was made from round waste wood from furniture industries. The multi-degree of freedom Helmholtz resonator was created through machining process for three different sound diffuser element diameter 4 cm,...
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