Apparatus and method for controlling speaker volume of push-to-talk (PTT) phone

An apparatus and method for controlling a speaker volume of a PTT phone are disclosed to avoid an undesirably loud volume sound from a speaker thereof that may be caused due to inadvertence of the user during a PTT call mode. In the PTT call mode, a user's holding of the PTT phone by the hand is sensed according to whether the user is in contact with a contact sensing unit provided at a PTT button or at a receiver, and the speaker volume is automatically adjusted according to a type of the holding (i.e., how the user is holding the PTT phone). Thus, emanation of undesirably loud sound from the loud speaker at an initial stage of call communication (i.e., when the first voice sound emanates from the loud speaker after being transmitted from the other party at a point when the user first listens to the voice of the other party) can be prevented for users' convenience.