Sound reproduction system and sound quality control method

A sound reproduction system comprising:

• an acoustic device configured to be worn by a user;
• a sensor configured to detect a movement of a shielding object;
• and
• a sound processor configured to generate sound with a first sound quality for a block state in which the shielding object blocks a virtual sound source localized on an opposite side of the shielding object and emit the sound from the acoustic device, the sound processor being further configured to change a sound quality of the sound from the first sound quality to a second sound quality for a non-block state in which the shielding object does not block the virtual sound source, in response to the sensor detecting that the shielding object moves from a position blocking the virtual sound source,
• the shielding object being a wall that separates a first space in which the user is present and a second space in which the virtual sound source is localized, and a door provided on the wall,
• the sensor being configured to detect an opening and closing of the door, and
• the sound processor being further configured to generate the sound with the second sound quality that is filtered by
• impulse response in the second space of the virtual sound source at a position of an open door, and
• a head-related transfer function from the position of the open door to the user.

A sound quality control method comprising:

• generating sound with a first sound quality for a block state in which a shielding object blocks a virtual sound source localized on an opposite side of the shielding object and emitting the sound from an acoustic device, by a sound reproduction system including the acoustic device configured to be worn by a user and a sensor configured to detect a movement of the shielding object, the shielding object being a wall that separates a first space in which the user is present and a second space in which the virtual sound source is localized, and a door provided on the wall, the sensor being configured to detect an opening and closing of the door and a degree of the opening and closing of the door;
• changing, by the sound reproduction system, a sound quality of the sound from the first sound quality to a second sound quality for a non-block state in which the shielding object does not block the virtual sound source, in response to the sensor detecting that the shielding object moves from a position blocking the virtual sound source;
• and
• generating sound with a sound quality obtained by cross-fading the first sound quality and the second sound quality, in accordance with the degree of the opening and closing of the door detected by the sensor.

A sound quality control method comprising:

• generating sound with a first sound quality for a block state in which a shielding object blocks a virtual sound source localized on an opposite side of the shielding object and emitting the sound from an acoustic device, by a sound reproduction system including the acoustic device configured to be worn by a user and a sensor configured to detect a movement of the shielding object, the shielding object being a wall that separates a first space in which the user is present and a second space in which the virtual sound source is localized, and a door provided on the wall, the sensor being configured to detect an opening and closing of the door;
• changing, by the sound reproduction system, a sound quality of the sound from the first sound quality to a second sound quality for a non-block state in which the shielding object does not block the virtual sound source, in response to the sensor detecting that the shielding object moves from a position blocking the virtual sound source;
• and
• generating the sound with the second sound quality that is filtered using impulse response in the second space of the virtual sound source at a position of an open door, and a head-related transfer function from the position of the open door to the user.