Patent ID: 7181029

Claim:
A speaker system for picture receiver, comprising: a first speaker for reproducing medium and high range sound which form a sound image nearly at the vertical center in the right and left region of the screen of a picture receiver; and a second speaker for reproducing medium and low range sound under the screen, wherein when a listening point is set at a point a first distance apart in forward direction of the screen and within a second distance from the front axis at the center of the right and the left of the screen, distance R 1 from the sound source position of the first speaker to the listening point, distance R 2 from the sound source position of the second speaker to the listening point, and crossover frequency f of the first speaker and the second speaker frequency-divided by dividing network satisfy the following relative formula: |exp(− j×k×R 1)×exp( j×D×π/ 4)+(−1) D+1 ×exp(− j×k×R 2)×exp(− j×D×π/ 4)|≧1/√{square root over (2)}, k= 2 π×f/c, exp=exponential function, j=unit of complex number, c=sound velocity, π=circular constant, D=degree of dividing network (0 or positive integers).