Air conditioner

An air conditioner to be used by being mounted on an indoor wall surface, comprising:

• a casing;
• an inlet provided to the casing, for introducing air in a room;
• an outlet provided to the casing, for delivering conditioned air, which is obtained by conditioning air introduced from the inlet, to the room;
• a blower for moving air from the inlet to the outlet;
• a blower passage communicating between the inlet and the outlet;
• a pivotable air flow guide panel provided in a vicinity of the outlet
• vertical louvers dividing the outlet into sections;
• and
• a plurality of speakers arranged at least one in each of the sections, each section being between two adjacent vertical louvers,
• wherein the air flow guide panel and the vertical louvers are operable to form a duct-like outlet passage serving as a one-dimensional sound field of sound from the speakers outside the outlet, and the speakers radiate a sound wave for canceling out operation noise including blower sound of the blower toward the duct-like outlet passage,
• wherein the each section have a width equal to or smaller than one-half of a wavelength of the sound wave radiated from the speakers.