Sound signal generation circuitry and sound signal generation method

Sound signal generation circuitry, configured to:

• obtain a position of a virtual user and sound of the virtual user, the virtual user representing a training partner of a real user;
• and
• generate, based on the position of the virtual user, the sound of the virtual user, and a head position of the real user, a control signal for at least two loudspeakers positioned in a real space, such that the at least two loudspeakers generate sound representing the virtual user at a predetermined position relative to the real user in the real space,
• wherein the head position of the real user includes at least a head height,
• the at least two loudspeakers are adjacent to each other and disposed in a same sound box that is fixed at a location spaced apart from the real user,
• the sound is generated to be perceived by the real user as originating from the predetermined position of the virtual user independent of head movement of the real user,
• the at least two loudspeakers include ultrasonic loudspeakers, and
• the control signal causes the ultrasonic loudspeakers to apply beamforming to project the sound via at least one of a ceiling reflection or a wall reflection to the real user.