Low-frequency noise control has consistently been a key focus and challenge in the field of noise control. Due to the limited effectiveness of traditional duct silencing materials in absorbing low-frequency noise

acoustic metamaterials have emerged as a prominent research topic. Previous designs of acoustic metamaterials often overlooked the structural load-bearing performance requirements imposed by practical application environments. Lattice-enhanced structures

as a significant branch of mechanical metamaterials

can be integrated into acoustic metamaterials to enhance their mechanical properties

thereby increasing the feasibility of applying acoustic metamaterials. This study introduces the plate-lattice structure from lattice-enhanced structures into a Helmholtz resonator

designing ventilated acoustic attenuationbearing metamaterials (VAABM). VAABM samples were fabricated using fused deposition modeling (FDM) technology. Their low-frequency sound attenuation performance was calculated using the transfer matrix method (TMM) and validated through finite element (FE) simulation and acoustic impedance tube testing. The results demonstrate that the transmission loss (TL) reaches 21.3 dB at 674 Hz and 33.8 dB at 1078 Hz

with a TL greater than 10 dB across the frequency band of 642–1600 Hz. Furthermore

the study investigates the influence of key geometric parameters of the metamaterial structure on the sound attenuation performance of VAABM

which is shown to primarily originate from the resonance effect. Additionally

the mechanical performance of VAABM is discussed and compared with that of two classic triply periodic minimal surface (TPMS) structures. The results indicate that VAABM exhibits superior load-bearing capacity and dimensional stability. The multifunctionality of VAABM endows it with broad application prospects in the field of duct noise control.