Patent ID: 7840017

Claim:
An audio message transfer sheet comprising: audio information recording/reproducing means having a thin shape and capable of recording/reproducing audio information; two support sheets, each having at least one first hole, said support sheets being bonded together and supporting said audio information recording/reproducing means, with at least a part of said audio information recording/reproducing means being exposed from at least one of said holes in said support means; and two surface sheets constructed of a paper base material and bonded to said two support sheets, the surface sheets sandwiching said two support sheets, wherein said audio information recording/reproducing means comprises audio information outputting means for outputting recorded audio information, said audio information outputting means comprising: a piezo-electric element for outputting said audio information; a film sheet having a larger diameter than said piezo-electric element, pasted to one surface of said piezo-electric element; and a diaphragm provided with a second hole having a diameter larger than the diameter of said piezo-electric element and smaller than the diameter of said film sheet, pasted to said film sheet in such a way that said piezo-electric element fits into said second hole, said diaphragm being bonded to one of said two support sheets only in an area of the surface of bonding with said film sheet where said diaphragm is not bonded to said film sheet, wherein one of said two surface sheets has an information display area, and a plurality of fine third holes in an area facing said diaphragm and the total thickness of said two support sheets is equal to or greater than the thickness of the thickest part of said audio information recording/producing means.