Patent ID: 7039210

Claim:
A carrying case for electronic devices or documents having a housing wherein the walls of the housing are of a multi-layered or sandwich construction consisting of at least one first layer of material with a maximum thickness of 4 mm and a high modulus of elasticity in shear, and of at least a second inner layer of material with a minimum thickness of 4 mm and a high modulus of elasticity in shear, high damping and low density, and of a third layer of material with a maximum thickness of 4 mm and a high modulus of elasticity in shear, said housing comprising: at least one loudspeaker for reproduction of audio frequencies mounted on one of said walls of the housing; at least one storage compartment for storing paper, documents, electronic devices or objects; said storage compartment which serves to create a loudspeaker enclosure for reproduction of low frequencies when closed.