Area reproduction method, computer readable recording medium which records area reproduction program, and area reproduction system

A computer readable recording medium that records an area reproduction program for outputting reproduced sound from a speaker array, including a plurality of speakers arranged to a predetermined area, the area reproduction program causing a computer to execute processing of:

• converting a sound pressure distribution at each frequency of the reproduced sound from a sound pressure distribution in a frequency domain into a sound pressure distribution in a spatial frequency domain, the reproduced sound being realized on a control line including a reproduction line in which sound waves emitted from the speaker array intensify with each other and a non-reproduction line in which the sound waves weaken with each other;
• determining a spatial frequency for use in adjustment of the reproduced sound, in the sound pressure distribution in the spatial frequency domain, based on a positional relationship between the speaker array and the control line;
• and
• adjusting a sound pressure of the reproduced sound which is to be output by each of the plurality of speakers using the determined spatial frequency,
• wherein in the determination of the spatial frequency, a spatial frequency for use in the adjustment of the reproduced sound is determined based on a first angle formed by a plane wave represented by the spatial frequency and by an array line along the speaker array, and a second angle represented by a straight line linking one point on the array line and one point on the control line and by the array line.

An area reproduction system, comprising:

• a reproduction device including a speaker array that includes a plurality of speakers arranged;
• and
• a processor that adjusts a sound pressure of a reproduced sound to be output by each of the plurality of speakers based on a control line, including a reproduction line in which sound waves emitted from the speaker array intensify with each other, and a non-reproduction line in which the sound waves weaken with each other, and causes the reproduction unit to output the reproduced sound,
• wherein the processor
• converts a sound pressure distribution at each frequency of the reproduced sound to be realized on the control line from a sound pressure distribution in a frequency domain into a sound pressure distribution in a spatial frequency domain,
• determines a spatial frequency for use in adjustment of the reproduced sound, in the sound pressure distribution in the spatial frequency domain, based on a positional relationship between the speaker array and the control line,
• adjusts a sound pressure of the reproduced sound which is to be output by each of the plurality of speakers using the determined spatial frequency, and
• in the determination of the spatial frequency, a spatial frequency for use in the adjustment of the reproduced sound is determined based on a first angle formed by a plane wave represented by the spatial frequency and by an array line along the speaker array, and a second angle represented by a straight line linking one point on the array line and one point on the control line and by the array line.