PORTABLE TERMINAL WITH HAND FREE SPEAKER

摘要

PROBLEM TO BE SOLVED: To provide a method for improving white noise for generating a signal electrically with a pseudo-rectangular wave or improving distortion of sound generated by amplitude amplification in order to ensure the volume of a portable terminal at the time of hand free use. SOLUTION: A hand free speaker on the back of a portable communication terminal is fixed with a speaker case for increasing the air chamber volume in front of the speaker. At the time of hand free use, the speaker case is raised from a speaker holder secured to the inner side of the communication terminal in order to increase the volume in front of the speaker thus ensuring a volume required for hand free use without converting a signal electrically.