The invention discloses a space bending low-
frequency sound absorption
superstructure based on a grooving type corrugated layer core, and belongs to the field of composite acoustic meta-materials. The
superstructure comprises a perforated plate, a grooving type corrugated layer core, a lower panel, a left inclined frame plate, a right inclined frame plate, a front frame plate and a rear frame plate. On one hand, the sound absorption structure is evolved into a perforated
sound absorber with a cavity by forming submillimeter-level to
millimeter-level holes in a penetrating mode. On the other hand, the corrugated layer core with a bearing function is introduced into the cavity, and double-side staggered grooving is ingeniously performed on the corrugated layer core, so that the back cavity is of a space coiling structure, and the low-
frequency noise absorption performance of the
sound absorber can be greatly enhanced without increasing the
total thickness. The structure is simple and practical, has good medium-
low frequency band sound absorption performance and independent
bearing capacity, and has a good and wide application prospect.