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:''For the Speech-language pathology topic, see'' Speech therapy Voice therapy or voice training refers to any non-surgical technique used to improve or modify the human voice. Because voice is a ''gender cue'', trans women frequently undertake voice therapy as a part of gender transition in order to make their voices sound female, and therefore increase their readability as females in society. Transgender people and crossdressers who present as women may also desire to feminize their voices and therefore undertake voice therapy. == Overview == Voice feminization is the desired goal of changing a perceived male sounding voice to a perceived female sounding voice. The term ''voice feminization'' is used to describe what the desired outcome of surgical techniques, speech therapy, self-help programs and a general litany of other techniques to acquire a female-sounding voice. The methods used for ''voice feminization'' vary from professional techniques used for vocal training, speech therapy by trained speech pathologists and several ''Pitch altering surgeries''. Vocal sound is produced by air traveling upwards from the lungs through the opening of the larynx called the glottis where the vocal folds vibrate and phonation or voicing occurs. The vibrating vocal folds produce a sound that is modified by chambers (like rooms) of the throat and mouth creating resonance frequencies. The size of the chambers directly affects these frequencies. As the size of the chambers increase the deeper (or lower) the formant frequencies become. These chambers play a very important role in the perception of the timbre (rich, nasal, flat) of the voice. The articulators (tongue, lips, jaw, and soft palate etc.) shape the sound into recognizable speech. Then it is the prosodic features (speaking rate, inflection, pauses) which makes unique speech patterns. There are several frequencies or harmonics produced at the lips. The fundamental frequency (F0) or the number of times per second that the vocal folds vibrate (in hertz), the conversational fundamental frequency is approximately 200 Hz for adult women and 125 Hz for adult men. Many of the voice feminization techniques, including those of surgeons, focus on the fundamental frequency but do little to address how the sound is modified by the articulators or prosodic features. Speech therapists and professional voice coaches offer training in both changing the fundamental frequency and how to change the perception of voice quality. 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, 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". Due to technological advancements in healthcare delivery, one of the most prominent voice feminization services is Vocal Key Speech Pathology. Vocal Key have progressed by delivering Skype based consultations for (transgender voice training ) to clients worldwide, in an attempt to alleviate the barriers around access to services. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Voice therapy (transgender)」の詳細全文を読む スポンサード リンク
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