Patent ID: 8406429

Claim:
A cellular phone device configured to spatially separate sounds from at least two sound sources, wherein the apparatus comprises: a sound detection unit configured to detect a first sound from a first sound source while a second sound is output from a second sound source; a control signal generating unit configured to generate a control signal when the sound detection unit detects the first sound while the first sound is output from the first sound source and the second sound is output from the second sound source simultaneously; and a sound control unit configured to perform a head-related transfer function (HRTF) on the second sound base on the generated control signal to move the second sound to a user's desired position according to a detection of the first sound by the sound detection unit, while the first sound is output from the first sound source, so that the second sound is set as a background sound, wherein the first sound is a sound of an incoming call and the second sound is a sound of music played on the device.