Patent ID: 7529570

Claim:
A folding cellular phone having a first housing and a second housing that is foldably connected to the first housing, the folding cellular phone comprising: a microphone mounted on the second housing; a variable amplifier for amplifying audio signals output from the microphone to modulate the volume; a detector for outputting a detection signal indicating whether or not the first and second housings are in closed positions; and a controller for controlling the gain of the variable amplifier based on the detection signal output from the detector; wherein, when the detection signal output from the detector indicates that the first and second housings are in closed positions, the controller sets the gain of the variable amplifier higher than that when the detection signal does not indicate that the first and second housings are in closed positions; and wherein the first housing has a notch in a position opposite to the microphone when the first and second housings are in closed positions.