1. A voice recognition apparatus comprising: a determination unit configured to determine whether a hand clapping sound having a level not lower than a predetermined level and occurring when hands of a speaker are clapped is included in a sound input from a microphone array; an estimating unit configured to estimate a sound source direction of the sound when the determination unit determines that the hand clapping sound is included in the sound; a voice recognition unit configured to recognize whether the sound obtained in the sound source direction coincides with a voice model registered beforehand; and an orientation control unit configured to adjust the orientation of the microphone array in the sound source direction of the sound, wherein when the determination unit determines that the hand clapping sound is included in the sound, the orientation control unit adjusts the orientation of the microphone array and the voice recognition unit operates.