Local resonance type light rectangular honeycomb sound absorption structure

A local resonance type light rectangular honeycomb sound absorption structure comprises a perforated panel, a rectangular honeycomb plate, a back plate and an insertion pipe, the insertion pipe penetrates through the perforated panel and then is arranged in a resonant cavity, and the perforated panel, the rectangular honeycomb plate and the back plate are connected in a sealed mode through epoxy glue thermocuring in a sandwich interlayer mode. And the whole material can be selected from a single material or a plurality of green and environment-friendly materials. The sound absorption structure achieves the purpose of light weight while ensuring the low-frequency sound absorption effect, and is low in surface quality and simple in design. The inner hole size of the insertion pipe or/and the length size of the insertion pipe can be periodically arranged, so that the sound absorption structure of which the overall thickness can be controlled within the range of 20-50mm meets the noise reduction requirements of m