Information processor, information processing system, information processing method, and program

An information processing system comprising:

• a first unit including an acoustic input section disposed within a predetermined distance from one ear hole of a user in a state of being worn by the user, the first unit detecting a first signal by the acoustic input section;
• a second unit that acquires a second signal indicating a noise generated from a noise source;
• and
• a third unit that generates a noise cancellation signal directed to the noise on a basis of the first signal and the second signal.

An information processing method comprising:

• acquiring a first signal to be detected by an acoustic input section of a first unit including the acoustic input section disposed within a predetermined distance from one ear hole of a user in a state of being worn by the user;
• acquiring a second signal to be acquired by a second unit, the second signal indicating a noise generated from a noise source;
• and
• generating a noise cancellation signal directed to the noise on a basis of the first signal and the second signal by a processor.