why voice of boys becomes hoarse at puberty ? Share with your friends Share 2 Mushtaq Ahmed answered this In boys, under the influence of hormones (testosterone), larynx grows prominently, vocal cords become longer and thicker, causing the voice to become hoarse. 12 View Full Answer Xyz Abc Zyx Cba answered this their voice boxes expand -3 Vijeth answered this because there is growth of adam's apple in boys during puberty so they have horse voice 4