Communication device and sidetone volume adjusting method thereof

A communication device comprising:

• a sound processor;
• a far-end sound receiver, which is electrically connected to the sound processor to receive a far-end sound wirelessly or over wires and transmit the far-end sound to the sound processor;
• a near-end sound receiver, which is electrically connected to the sound processor to detect the near-end sound and make the sound processor receive the near-end sound to form a sidetone;
• a volume adjuster, which is electrically connected to the sound processor to adjust the volume of the far-end sound through the control of the sound processor to form an adjusted far-end sound, and the volume adjuster further adjusts the sidetone volume through the control of the sound processor to form an adjusted sidetone, wherein the volume of the adjusted sidetone is determined by the near-end sound and the adjusted far-end sound;
• and
• a sound player, which is electrically connected to the sound processor for playing the adjusted sidetone and the adjusted far-end sound.