Device and method for voice activity detection

The invention relates to a pair of concrete for is a microphone system of sensitivity and related sound source space position used in the mobile phone, and a voice the movable detection device, wherein the same mobile device and device and method. The device comprises scroll for judging sound signal for comprises a voice sound signal analyzer. According to the invention, wherein the device further - comprising a microphone system (2a, modules 2c, terminal, 2e), arranged is an of a sound source on microphone system different directions of the sound for), a loudspeaker for with a movable of multiple direction spliced is formed possibly comprises a voice signal comprises a.