Patent ID: 8488802

Claim:
A sound field control device comprising: an input part through which an audio signal is input; a storage part that stores a plurality of first factors in correspondence to a plurality of speakers in case that the plurality of the speakers are used to reproduce sound, wherein a first factor is obtained by calculating a proportion of energy of direct sound in total energy of sound collected in an adjustment environment within a predetermined time; and one or more processors configured to function as: a sound field generation part that generates a sound field effect sound from the audio signal input through the input part and that outputs the sound field effect sound at a volume corresponding to the first factor, a calculation part that calculates a plurality of second factors in correspondence to the plurality of speakers in case that the plurality of the speakers are used to reproduce sound, wherein a second factor represents a ratio of an energy of a direct sound to an energy of sound which is collected in a reproduction environment and which contains the direct sound, and a correction part that corrects the volume of the sound field effect sound for each of the plurality of the speakers based on a plurality of ratios between the plurality of the first factors and the plurality of the second factors.