Composite sound-absorbing device with built in resonant cavity
作者： Jun Yang
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摘要: The composite sound-absorbing device of the present invention includes a perforated board having number first pores thereon, back and side boards, board, boards forming closed cavity, wherein: at least one or more resonant cavities being located within cavity; second on cavities; connected with cavity volume V=10 mm 3 −1×10 10 , thickness 0.05 mm-10 mm, an aperture d′=0.05-100 perforation rate σ′=0.01%-30%. is beneficial to improve effect expand frequency band sound-absorbing.
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