Sound field control device

Details Sound field control device Sound field control device

1994-03-01

1996-06-04

Kuntz, Curtis

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

381 63, 381 61, 381 17, H04R 500

Patent

active

055240534

ABSTRACT:
A sound field control device for reproducing plural reflected sound signals of a source signal about a listening point includes a reflected sound signal generation section for generating reflected sound signals to be sounded at front left and front right positions of the listening point and a reflected sound signal to be sounded at a rear position of the listening point, a phase shifting circuit for phase shifting the reflected sound signal to be sounded at a rear position and thereby producing a first phase shifted signal and a second phase shifted signal which are different in phase substantially by 180 degrees from each other, a first adder for adding the reflected sound signal to be sounded at a front left position and the first phase shifted signal together, and a second adder for adding the reflected sound signal to be sounded at a front right position and the second phase shifted signal together. Outputs of the first adder and the second adder are used for driving loudspeakers disposed at front left and front right positions of the listening point. A stereophonic sound field rich in presence can be created with only two loudspeakers without using four loudspeakers as in a prior art device.

REFERENCES:
patent: 3725586 (1973-04-01), Jida
patent: 3745254 (1973-07-01), Ohta
patent: 4308423 (1981-12-01), Cohen
patent: 4980914 (1990-12-01), Kunugi
patent: 5105462 (1992-04-01), Lowe
patent: 5197100 (1993-03-01), Shiraki
patent: 5371799 (1994-12-01), Lowe

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