Communication terminal device

A hand-held type communication terminal device comprising:

• a touch panel for enabling a user to perform a data input operation using a pen;
• a detector for detecting a movement of the pen;
• a microphone for inputting a sound signal;
• a memory for storing a pen frictional sound sample data;
• a canceling signal generator for generating a cancel signal for canceling a pen frictional sound included in the sound signal which is input by the microphone using the pen frictional sound sample data stored in the memory when the detector detects the movement of the pen;
• a noise canceler for processing the sound signal to eliminate the pen frictional sound therefrom using the cancel signal;
• and
• a transmitter for transmitting the processed sound signal;
• wherein said detector comprises means for detecting a rate of change of a position of the pen on said touch panel and means for comparing the rate of change with a threshold level to detect the movement of the pen.