Acoustic control apparatus, method, program, and device including the apparatus

A non-transitory computer readable medium storing a computer program which is executed by a computer to provide the steps of:

• obtaining a sound signal including sound information, the sound signal being based on sounds emitted from sound sources;
• calculating a first relationship established between acoustic filter coefficients, based on the sounds which are driven by a drive signal obtained by applying the sound signal to the acoustic filter coefficients set for each sound source;
• calculating a second relationship established between the acoustic filter coefficients by matching a first sound pressure ratio with a second sound pressure ratio, in a complex sound pressure ratio between ears of a user who desires the sound information, the first sound pressure being based on a synthetic sound of the sounds emitted from the sound sources, and the second sound pressure being based on a virtual sound source, assuming that the virtual sound source of a virtual acoustic image is present in an incoming direction of the synthetic sound;
• and
• setting an acoustic filter coefficient corresponding to each of the sound sources, based on the first relationship and the second relationship.

An acoustic control method comprising:

• obtaining a sound signal including sound information, the sound signal being based on sounds emitted from sound sources;
• calculating a first relationship established between acoustic filter coefficients, based on the sounds which are driven by a drive signal obtained by applying the sound signal to the acoustic filter coefficients set for each sound source;
• calculating a second relationship established between the acoustic filter coefficients by matching a first sound pressure ratio with a second sound pressure ratio, in a complex sound pressure ratio between ears of a user who desires the sound information, the first sound pressure being based on a synthetic sound of the sounds emitted from the sound sources, and the second sound pressure being based on a virtual sound source, assuming that the virtual sound source of a virtual acoustic image is present in an incoming direction of the synthetic sound;
• and
• setting an acoustic filter coefficient corresponding to each of the sound sources, based on the first relationship and the second relationship.