@article {Swearingen:2018:0736-2935:3569, title = "Distorting an Impulse Wave with Phononic Metamaterials - a Scale Model Study", journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings", parent_itemid = "infobike://ince/incecp", publishercode ="ince", year = "2018", volume = "258", number = "4", publication date ="2018-12-18T00:00:00", pages = "3569-3575", itemtype = "ARTICLE", issn = "0736-2935", url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2018/00000258/00000004/art00064", author = "Swearingen, Michelle and Dorvee, Jason and Albert, Donald and Muhlestein, Michael and Kreiger, Megan and O'Daniel, James", abstract = "Bench-scale experiments were performed to characterize impulsive signal distortion with metamaterial arrays. Performing this task required the design of three unique elements: a low-cost, semi-anechoic chamber suitable for high frequencies; an in-lab tunable impulse source for both high frequencies and high amplitude; and a microphone array design for mapping the 3-D distortion of the impulse wave. The metamaterial arrays were achieved through the 3-D printed configurations of computer aided designs (CAD) extracted directly from a numerical model for exacting representations of configurations. A description of each component in the experiment and preliminary results are presented. Challenges presented by each of the components of the experimental design are also discussed. [The work described in this document was funded under the US Army Basic Research Program under PE 61102, Project T22, Task 01 "Military Engineering Basic Research"; Task 02 "Material Modeling for Force Protection" ; Project T25, Task 01 "Environmental Science Basic Research" and was managed and executed at the US Army ERDC.]", }