Question: Michael Maniaci is the type of voice that is a specific type of what?

full_context: Document 1: Falsettone: Falsettone is a term used in modern Italian musicology to describe a vocal technique used by male opera singers in the past, in which the fluty sounds typical of falsetto singing are amplified by using the same singing technique used in the modal voice register. The result is a bright, powerful tone, often very high-pitched, although the sound is still different from and more feminine than what is produced by the modal voice. The term "falsettone" is also used for the mixed vocal register that can be achieved using this technique.
Document 2: Lawrence Brownlee: Lawrence Brownlee (born 1972) is an American operatic tenor particularly associated with the bel canto repertoire. Describing his voice, Speight Jenkins, general director of the Seattle Opera, said: "There are other singers that sing this repertory very well, but I don't think anyone else has quite as beautiful a sound and as rounded a tone," and praise his "incredible top notes", adding about his high F (F) in "Credeasi, misera": "With him it's not a scream, it's a beautiful sound." Mezzo-soprano Joyce DiDonato adds: "He is always in service of the music. His natural instrument is just incredibly beautiful. The word 'honey' comes to mind. He also has technical prowess and agility."
Document 3: Voice type: A voice type is a particular human singing voice identified as having certain qualities or characteristics of vocal range, vocal weight, tessitura, vocal timbre, and vocal transition points ("passaggio"), such as breaks and lifts within the voice. Other considerations are physical characteristics, speech level, scientific testing, and vocal register. A singer's voice type is identified by a process known as voice classification, by which the human voice is evaluated and thereby designated into a particular voice type. The discipline of voice classification developed within European classical music and is not generally applicable to other forms of singing. Voice classification is often used within opera to associate possible roles with potential voices. Several different voice classification systems are available to identify voice types, including the German "Fach" system and the choral music system among many others; no system is universally applied or accepted.
Document 4: Sopranist: A sopranist (also, sopranista or male soprano) is a male singer who is able to sing in the vocal tessitura of a soprano usually through the use of falsetto vocal production. This voice type is a specific kind of countertenor. In rare cases an adult man may be able to sing in the soprano range using his normal or modal voice and not falsetto due to endocrinological reasons, like Radu Marian, or as a result of a larynx that has not completely developed as in the case of Michael Maniaci.
Document 5: Soprano sfogato: Soprano sfogato ("Vented" soprano) is a term which, in the art of singing, designates a contralto or mezzo-soprano who is capable—by sheer industry or natural talent—of extending their upper range and being able to encompass the coloratura soprano tessitura. An upwardly extended "natural" soprano is sometimes called "soprano assoluto."
Document 6: Michael Chioldi: Michael Chioldi (born May 24, 1970) is an American operatic baritone who has performed at many major American opera houses and festivals, including the Metropolitan Opera, San Francisco Opera, Washington National Opera, Houston Grand Opera, San Diego Opera, Santa Fe Opera, Los Angeles Opera, Palm Beach Opera, Long Beach Opera, Minnesota Opera, Spoleto Festival USA, Arizona Opera, Utah Opera, New York City Opera, Fort Worth Opera, Chautauqua Opera, Kentucky Opera, Glimmerglass Opera, Hawaii Opera Theatre, Santa Fe Concert Association, Lyric Opera of Kansas City, Chicago Opera Theatre, Austin Lyric Opera, New Orleans Opera, Odyssey Opera, Michigan Opera Theatre and Vermont Opera Project.
Document 7: Anthony Michaels-Moore: Anthony Michaels-Moore (born 8 April 1957) is an English operatic baritone and the first British winner of the Luciano Pavarotti International Voice Competition (Philadelphia, 1985) Anthony has since performed in many of the world's major opera houses across Europe, the Americas, and Asia. He has distinguished himself as a specialist in Verdi and Puccini roles, most renowned for his portrayals of Falstaff, Nabucco, Rigoletto, Simon Boccanegra, Iago in "Otello", Germont in "La traviata", Sharpless in "Madama Butterfly", and Scarpia in "Tosca". In addition to the standard repertoire, he has sung and recorded the baritone roles of some of the less-known 19th Century Italian operas.
Document 8: Countertenor: A countertenor (or contra tenor) is a type of classical male singing voice whose vocal range is equivalent to that of the female contralto or mezzo-soprano voice types, generally extending from around G to D or E, although a sopranist (a specific kind of countertenor) may match the soprano's range of around C to C. Countertenors often are baritones or tenors at core, but rarely use this vocal range in performance.
Document 9: Castrato: A castrato (Italian, plural: "castrati") is a type of classical male singing voice equivalent to that of a soprano, mezzo-soprano, or contralto. The voice is produced by castration of the singer before puberty, or it occurs in one who, due to an endocrinological condition, never reaches sexual maturity.
Document 10: Voice Male: Voice Male is a six-man contemporary a cappella group based in Utah. The group performs covers of contemporary popular songs as well as traditional Latter-day Saint music and some original material. Voice Male formed at Utah State University in 1994 as a nine-man group, Over the next two years several members of the group left, and auditions were held for replacements. A short time later a couple more members left leaving the group with six members. Voice Male decided at that time to keep the group at six and they remained unchanged until 2010 when Phil Kesler died from cancer. Rick Murdock was officially added as a new member in 2011. Voice Male was the winner of the holiday album category in the 1999 "Contemporary A Cappella Society" for "Jingles", was runner up in the 2001 awards in the cover/pop song category for "Light in Your Eyes" from "Hooked", was runner up in the 2006 awards in the holiday album category for "Jingles 2", as well as the holiday song category for o come, o come Emmanuel.
Document 11: Michael Maniaci: Michael Maniaci (born in 1976 May 3) is an American opera singer. Possessing a male soprano voice, Maniaci is noted for his claim to be able to sing into the upper soprano register without using falsetto, an otherwise common phonation for men who sing in high registers, such as countertenors. Although this was possible for castrati, because of the hormonal imbalance following castration, Maniaci claims that, for some unknown reason, his larynx did not develop and lengthen completely, causing his voice not to "break" in the usual manner. Maniaci claims that this physical particularity has given him the ability to sing in the soprano register without sounding like a typical countertenor or a female singer. There are, however, critics who claim that Maniaci actually sings in falsetto.
Document 12: Soprano: A soprano ] is a type of classical female singing voice and has the highest vocal range of all voice types. The soprano's vocal range (using scientific pitch notation) is from approximately middle C (C) = 261 Hz to "high A" (A) =880 Hz in choral music, or to "soprano C" (C, two octaves above middle C) =1046 Hz or higher in operatic music. In four-part chorale style harmony, the soprano takes the highest part, which usually encompasses the melody.
Document 13: Michael Scott (artistic director): Michael Scott is the founder of the London Opera Society. In his role as the society's sole artistic director, he brought to London Marilyn Horne, Joan Sutherland, and Boris Christoff. He was also responsible for introducing Sherrill Milnes, Ruggero Raimondi, and Montserrat Caballe. He is a highly regarded expert in the field of opera with an extensive knowledge of the history of vocal music, and his books include volumes 1 and 2 of "The Record of Singing" and "The Great Caruso". In 1992, he also wrote "Maria Meneghini Callas", being one of the few Maria Callas biographers to have seen her frequently on stage in her prime. He is a frequent contributor to "Opera News".
Document 14: Boy soprano: A boy soprano is a young male singer with an unchanged voice in the soprano range.
Document 15: Tenor: Tenor is a type of classical male singing voice whose vocal range is between the countertenor and baritone voice types. The tenor's vocal range (in choral music) lies between C, the C one octave below middle C, and A, the A above middle C. In solo work, this range extends up to C, or "tenor high C". The low extreme for tenors is roughly A♭ (two A♭ s below middle C). At the highest extreme, some tenors can sing up to two Fs above middle C (F).
ground_truth: countertenor