Multifunctional and customizable lattice structures for simultaneous sound insulation and structural applications

•Elastically isotropic plate and tube hybrid lattice structure.•High sound insulation up to 32 dB at around 1810 Hz.•Mechanisms attribute to Helmholtz resonance and Bragg’s scattering.•Analytical microstructural model to model sound transmission loss.•Customizable properties with different structural factor and cell size.