Patent ID: 7413248

Claim:
An acoustic structure of seat back, in which the seat back includes a backrest area for receiving a back portion of a seat occupant, comprising: a urethane foam padding formed in conformity with a predetermined outer shape of said seat back, said padding including a central backrest area corresponding with said backrest area, said central backrest area facing forward of the seat back; a seat back frame provided in said padding; an acoustic and vibration generator unit for imparting sound and vibration to said back portion of said seat occupant, said acoustic and vibration generator unit being provided within said padding and disposed behind said central backrest area of the padding; said acoustic and vibration generator unit comprising: a suspension board element supported by said seat back frame in a suspended manner, said suspension board element having a forward surface facing forward of the seat back and a backward surface facing backward of the seat back; a width of said suspension board element being at least equal to that of said back portion of said seat occupant; a speaker unit fixed on said backward surface of said suspension board element; a sound-conductive cushion element formed in a flat plate configuration of hollow fibers which has a forward surface facing forward of the seat back and a backward surface facing backward of the seat back, wherein said backward surface of said sound-conductive cushion element is juxtaposed on said forward surface of said suspension board element, and wherein a width and height of said sound-conductive cushion element is substantially equal in size to said suspension board element; said central backrest area of said padding overlaying said forward surface of said sound-conductive cushion element, and a trim cover assembly covering said padding as well as said central backrest area of the padding.