DEVICE FOR IMPROVING SOUND QUALITY OF MFD IN MOBILE COMMUNICATION TERMINAL AND METHOD THEREFOR, CAPABLE OF PREVENTING THE DETERIORATION OF SOUND QUALITY CAUSED BY WEAK VIBRATION GENERATED WHEN VOICE OR BELL SOUND IS OUTPUTTED TO THE MFD

摘要

PURPOSE: A device for improving the sound quality of an MFD(Multi Function Device) in a mobile communication terminal is provided to distinguish/process between signals to be amplified and signals which do not have to be amplified, and to remove a frequency at less than 200Hz from a voice signal and a bell sound signal, thereby effectively preventing the sound quality from deteriorating. CONSTITUTION: The first switching portion(210) separates a voice signal, a bell sound signal, and a vibration frequency signal outputted from an audio processor(200-1) into the first and second paths. An operation of the first switching portion(210) is controlled by a control signal outputted from an MSM(200) by corresponding to an operational mode of a mobile communication terminal. The first switching portion(210) consists of two audio switches(50,51) for switching audio signals outputted from two output terminals(EAR+,EAR-) of the audio processor(200-1), respectively. An audio amplifier(220) amplifies the separated bell sound signal and the vibration frequency signal. A filter(230) filters the amplified bell sound signal.