NOTEBOOK-SIZED PERSONAL COMPUTER

PROBLEM TO BE SOLVED: To improve the recognition rate of a voice recognizing function by composing a personal computer of a directional microphone apparatus having plural microphones and an adder for adding the voice outputs of the microphones, and arranging the microphones at the outer peripheral part of the casing of the notebook-sized personal computer. SOLUTION: Microphones 3a-3c are provided on a front side face 5 of a display part 4 at an outer peripheral part 7 of the casing and attached in the depth of openings 5a-5c provided on the front side face 5. The microphones 3a-3e are arranged along with an axis vertical to the direction of voice propagation from an operator (speaker) who operates an input part toward the side of an operating plane. Audio data collected by the microphones 3a-3c are inputted to the adder and added so that directivity to the speaker can be obtained. Thus, the audio data having sound pressure/frequency characteristics not to be affected by the position of the operator or opening angle of the display part can be obtained and the notebook-sized personal computer improved in the recognition rate of the voice recognizing function can be provided.