新型斜截面形状嵌套谐振器的吸声特性研究

Here, a new type oblique-section nested resonator was designed and its sound-absorbing characteristics were studied. Impedance tube test results showed that different combinations of single layer structures have a tunable low-frequency wide frequency-band sound-absorbing effect; the sound absorption mechanism is air frictions in micro-structure areas and structural resonances causing sound energy dissipated into heat energy. Acoustic-electric analogy model tests showed that sound absorption's peak and bandwidth can be improved through changing resonator structures' size and combinations; the proposed nested resonator is easy to fabricate, and has a guide action in low frequency sound absorption engineering.