<prompt> Masculine voice in females is treated byThyroplasty type 1Thyroplasty type 2Thyroplasty type 3Thyroplasty type 4  <response>: The masculine voice in females is treated by Thyroplasty type 3. It is used to shoen relax the vocal cord. Relaxation of vocal cord lowers the pitch. This procedure is done in mutational falsetto or in those who have undergone gender transformation from female to male. Ref: PL Dhingra Textbook of Ear, Nose and Throat, Edition 6, page - 302 