| 摘要 |
PROBLEM TO BE SOLVED: To provide a directivity controller that can provides clear and unidirectional radiation properties by having only to use two loudspeakers and to provide a game machine employing the directivity controller. SOLUTION: The directivity controller for driving two loudspeakers placed closely to each other to obtain clear unidirectional radiation properties is provided with a delay circuit 22R or 22L for delaying an input signal by a time corresponding to an interval between the two loudspeakers and providing an output, and an acoustic signal from a sound source is supplied to one of the two loudspeakers, and a signal resulting from delaying the acoustic signal with the delay circuits 22R, 22L and inverting the phase by constant integration circuits 24Re, 24Rf or 24Le, 24Lf is supplied to the other. |
