Voice masculinization is the opposite of voice feminization, being the change of a voice from feminine to masculine. Voice masculinization is not generally required for transgender men as the masculinising effects of testosterone on the larynx are usually sufficient to produce a masculine voice. However, Alexandros N. Constansis has stated that "apart from being unfair to transmen, assumption is also overtly simplistic" and cites Davies and Goldberg in saying that "testosterone doesn’t always drop pitch low enough for FTMs to be perceived as male". Many transgender men also choose not to take testosterone, and use voice masculinization as an alternative way to deepen their voices.