Patent ID: 6427136
Filing Date: 2002-07-30
Classification: G06F,G10L

Abstract:
A sound device provided in an expansion station for a computer and supplied with a sound signal from the computer so as to produce a sound, comprising:a silent state detecting unit for detecting a silent state in the sound signal supplied by the computer; a sound production preventing unit for preventing a sound from being produced from said sound signal supplied by the computer when the silent state is detected by said silent state detecting unit; said sound detecting unit for detecting a sound signal that exceeds a predetermined reference level supplied by the computer subsequent to the detected silent state; a frequency detecting unit for detecting a noise frequency of said sound signal supplied by the computer when the silent state is detected by said silent state detecting unit; a storage unit for storing the noise frequency detected by said frequency detecting unit; and a filter unit for attenuating components of said sound signal at a stored noise frequency stored in said storage unit, when the silent state is not detected.