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Continue to ChatExperimental observation of far-field and near-field focusing in a sonic crystal flat lens in air - https://avesis.inonu.edu.tr/yayin/d3ddb47a-f58c-41a9-b9d5-44bdf6bd559f/experimental-observation-of-far-field-and-near-field-focusing-in-a-sonic-crystal-flat-lens-in-air