Noise　reduction　is　essential　in　engineering　applications,　and　flexible　impedance　tuning　in　acoustic　metamaterials,　which　enables　low-frequency　broadband　absorption,　has　garnered　attention　within　the　physics　and　engineering　research　communities.　However,　traditional　acoustic　metamaterials　suffer　from　fixed　absorption　bands　due　to　their　rigid　cavities.　We　break　this　limitation　by　replacing　the　cavity　walls　of　a　Helmholtz　resonator　with　Kresling　origami　sheets,　creating　the　first　tristable　origami-inspired　acoustic　metamaterial　(OIAM),　enabling　dynamic　absorption　frequency　tuning　through　structural　reconfiguration.　By　integrating　theoretical　modeling,　numerical　simulations,　and　experimental　validation,　our　research　successfully　illustrates　that　the　OIAM　achieves　tunable　absorption　frequencies　(149　Hz,　180　Hz,　and　275　Hz)　with　α＞0.95　at　a　subwavelength　thickness　of　1/22λ,　corresponding　to　its　three　stable　states—the　first　demonstration　of　state-switched　broadband　tuning　in　Kresling　pattern　origami.　The　truss　model　shows　that　the　angle　parameter　affects　the　stable　states　of　the　OIAM,　enabling　modes　such　as　zero-stiffness,　bistability,　and　tristability,　as　seen　in　compression　tests.　Compared　to　a　single　unit,　the　four-unit　parallel　OIAM　can　effectively　broaden　the　absorption　bandwidth　by　230%.　The　multi-stable　properties　enhance　energy　absorption,　load-bearing　capacity,　and　multifunctionality,　while　the　foldable　design　ensures　convenient　installation　and　transportation.　In　summary,　our　flexible　design　offers　an　effective　solution　for　engineering　applications　that　demand　tunable　sound　absorption　and　load-bearing　capacity.　©　2025