Noise control device

An integrated circuit for reducing noises respectively arriving in a plurality of spaces which are acoustically independent from each other, the integrated circuit comprising:

• an input terminal to which an output from one of noise detection means is inputted, which noise detection means is provided in at least one of the plurality of spaces and detects a noise arriving in the at least one of the plurality of spaces in which the noise detection means is provided;
• signal generation means which is a single means for generating, based on the output from said one of the noise detection means which is inputted to the input terminal, a cancellation signal for canceling the noise detected by said one of the noise detection means;
• and
• an output terminal for outputting the cancellation signal, which is generated by the signal generation means, to each of sound output means which are respectively provided in the plurality of spaces so as to respectively correspond to the plurality of spaces and each of which outputs a sound to a corresponding space.

A headphone apparatus for reducing noises respectively arriving in two spaces which are acoustically independent from each other and which are respectively formed near left and right ears of a user, the headphone apparatus comprising:

• left ear sound output means, which is provided at a space formed near the left ear, for outputting a sound in the space;
• right ear sound output means, which is provided at a space formed near the right ear, for outputting a sound in the space;
• noise detection means, which is provided in at least one of the two spaces, for detecting a noise arriving in the at least one of the two spaces;
• and
• signal generation means which is a single means for generating, based on the noise detected by one of the noise detection means, a cancellation signal for canceling the noise, and outputting the generated cancellation signal to the left ear sound output means and to the right ear sound output means.