Dynamic Environments Testing, Volume 7: Proceedings of the 43rd IMAC, A Conference and Exposition on Structural Dynamics, 2025, the seventh volume of twelve from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects Dynamic Environments Testing including papers on:Dynamic Environment Definition and SpecificationDynamic Testing Fixture Design and Fixture NeutralizationMeasurement Sensitivity to Test DesignMulti-Degree of Freedom Shaker Testing and Environments SpecificationResonant Plate Shock Testing