Sound analysis system, sound analysis method, and program

A sound analysis method comprising:

• acquiring a sound pressure of a voice of a user by each of first and second sound pressure acquisition means disposed in an equipment worn by the user at positions that differ in a distance from a mouth of the user under a state in which the user is wearing the equipment;
• estimating a distance between the first or the second sound pressure acquisition means and the mouth of the user based on the sound pressures acquired by the first and the second sound pressure acquisition means and a distance correspondence map adapted to indicate a relationship between the sound pressure acquired by each of the first and the second sound pressure acquisition means and the distance between the first or the second sound pressure acquisition means and the mouth of the user;
• and
• calculating a difference between a reference value of the distance between the first or the second sound pressure acquisition means and the mouth of the user and the estimated distance, and correcting at least one of the sound pressures acquired by the first and the second sound pressure acquisition means based on the calculated difference.

A non-transitory computer readable medium storing a program for causing a computer to execute the processes of:

• acquiring a sound pressure of a voice of a user by each of a first and a second sound pressure acquisition means disposed in an equipment worn by the user at positions that differ in a distance from a mouth of the user under a state in which the user is wearing the equipment;
• estimating a distance between the first or the second sound pressure acquisition means and the mouth of the user based on the sound pressures acquired by the first and the second sound pressure acquisition means and a distance correspondence map adapted to indicate a relationship between the sound pressure acquired by each of the first and the second sound pressure acquisition means and the distance between the first or the second sound pressure acquisition means and the mouth of the user;
• and
• calculating a difference between a reference value of the distance between the first or the second sound pressure acquisition means and the mouth of the user and the estimated distance, and correcting at least one of the sound pressures acquired by the first and the second sound pressure acquisition means based on the calculated difference.

A sound analysis system comprising:

• first and second sound pressure acquisition units configured to respectively acquire a sound pressure of a voice of a user and disposed in an equipment worn by the user at positions that differ in a distance from a mouth of the user under a state in which the user is wearing the equipment;
• a distance estimation unit configured to estimate a distance between either the first or the second sound pressure acquisition unit and the mouth of the user based on the sound pressures acquired by the first and the second sound pressure acquisition units and a distance correspondence map adapted to indicate a relationship between the sound pressure acquired by each of the first and the second sound pressure acquisition units and the distance between the first or the second sound pressure acquisition unit and the mouth of the user;
• and
• a sound pressure correction unit configured to calculate a difference between a reference value of the distance between the first or the second sound pressure acquisition unit and the mouth of the user and the distance estimated by the distance estimation unit, and correcting at least one of the sound pressures acquired by the first and the second sound pressure acquisition units based on the calculated difference.