Acoustic Metamaterials in Printed Photopolymers: Resonance, Damping, Manufacturing Variation and Band-Gap Verification

Printed acoustic metamaterials can show strong attenuation or band-gap behaviour only when resonator geometry, damping, specimen length and boundary conditions remain inside the intended regime. ER-366 links transfer-function or insertion-loss measurements to laser- vibrometric or pressure-field maps, CT metrology and frequency-dependent constituent properties. Cell-count sweeps distinguish bulk behaviour from sample-boundary modes, while temperature and deliberate geometric perturbations expose damping and manufacturing sensitivity. The qualification problem is therefore expressed as a guaranteed frequency interval and attenuation level under stated variation, together with evidence that identifies whether local resonance, Bragg scattering or boundary artifacts control the measured response.

ER-366.