Patent ID: 7684577
Filing Date: 2010-03-23
Classification: A47C,B60N,B60R,H04R,H04S

Abstract:
1. A three dimensional sound field reproducing unit comprising: at least three speakers provided within a headrest on the top of a backrest of a seat respectively for each of left and right external ears of a listener occupying the seat so as to reproduce sound fields that can be reproduced within a region of space defining a triangle by connecting three control points near the external ears, each control point being defined by a position of one of said at least three speakers, the headrest having a front, a back, a top, a bottom, and left and right sides, wherein the speakers are positioned in the front of the headrest in an area of the headrest where the listener's head rests, so as to sandwich a head of the listener; and three dimensional signal processing means for converting an output signal from a sound source into a three dimensional sound field signal for supplying it to each of said speakers, wherein said speakers are provided in up and down positions near the left and right external ears of the listeners occupying the seat, respectively.