Patent ID: 8752467

Claim:
A wearable air blast wave energy protection device, the device comprising: (a) a layer of a first material shaped and configured to reflect a substantial portion of incident air blast wave energy originating from a high-order explosive, the first material having a first acoustic impedance substantially mismatched to the acoustic impedance of air; and (b) a layer of a second material shaped and configured for wearing proximate to an exterior portion of a human body, the second material including at least two attenuating-regions, the at least two attenuating-regions including (i) a first attenuating-region configured to attenuate a first range of overpressures of the incident air blast wave energy transmitted through the layer of the first material utilizing a first inelastic response, the first attenuating-region comprising a first yield stress; and (ii) a second attenuating-region configured to attenuate a second range of overpressures different from the first range of overpressures of the incident air blast wave energy transmitted through the layer of the first material utilizing a second inelastic response, the second attenuating-region comprising a second yield stress different from the first yield stress of the first attenuating-region, wherein the layer of the first material includes a front surface and a back surface, the layer of the second material includes a front surface and a back surface, and at least a portion of the back surface of the layer of the first material is proximate to at least a portion of the front surface of the layer of the second material.