Patent ID: 7751574

Claim:
A reverberation apparatus for creating an acoustic effect of an acoustic space which is arranged with a sound generating point for generating a sound, said sound generating point having an orientation oriented in an initial direction to a target point and a sound receiving point for receiving the sound which travels from the sound generating point to the sound receiving point through sound ray paths within the acoustic space, and for applying the created acoustic effect to an audio signal representative of the sound generated from the sound generating point, the reverberation apparatus comprising: a storage device that stores a directional characteristic representing a directivity of the generated sound at the sound generating point; and a hardware processor comprising a position indicating section that indicates a position of the sound generating point and a position of the sound receiving point within the acoustic space; an orientation control section that identifies the direction to the target point from the sound generating point at the position indicated by the position indicating section, and changes the orientation of the sound generating point to be oriented in the identified direction within the acoustic space without user input; an impulse response determining section that determines an impulse response for each of the sound ray paths along which the sound emitted from the sound generating point travels to reach the sound receiving point, in accordance with the directional characteristic of the generated sound stored in the storage device and the orientation of the sound generating point changed by the orientation control section; and a calculation section that performs a convolution operation between the impulse response determined by the impulse response determining section and the audio signal representing the sound generated from the sound generating point so as to apply thereto the acoustic effect.