Chest voice
Encyclopedia
Chest voice is a term used within vocal music
Vocal music
Vocal music is a genre of music performed by one or more singers, with or without instrumental accompaniment, in which singing provides the main focus of the piece. Music which employs singing but does not feature it prominently is generally considered instrumental music Vocal music is a genre of...

. The use of this term varies widely within vocal pedagogical
Vocal pedagogy
Vocal pedagogy is the study of the art and science of voice instruction. It is used in the teaching of singing and assists in defining what singing is, how singing works, and how proper singing technique is accomplished....

 circles and there is currently no one consistent opinion among vocal music professionals in regards to this term. Chest voice can be used in relation to the following:
  • A particular part of the vocal range
    Vocal range
    Vocal range is the measure of the breadth of pitches that a human voice can phonate. Although the study of vocal range has little practical application in terms of speech, it is a topic of study within linguistics, phonetics, and speech and language pathology, particularly in relation to the study...

     or type of vocal register
  • A vocal resonance
    Vocal resonation
    Vocal resonation is the process by which the basic product of phonation is enhanced in timbre and/or intensity by the air-filled cavities through which it passes on its way to the outside air...

     area
  • A specific vocal timbre
    Timbre
    In music, timbre is the quality of a musical note or sound or tone that distinguishes different types of sound production, such as voices and musical instruments, such as string instruments, wind instruments, and percussion instruments. The physical characteristics of sound that determine the...


History

The first recorded mention of the term chest voice was around the 13th century, when it was distinguished from the throat and the head voice (pectoris, guttoris, capitis -- at this time it is likely head voice referred to the falsetto register
Falsetto
Falsetto is the vocal register occupying the frequency range just above the modal voice register and overlapping with it by approximately one octave. It is produced by the vibration of the ligamentous edges of the vocal folds, in whole or in part...

) by the writers Johannes de Garlandia and Jerome of Moravia
Jerome of Moravia
Jerome of Moravia was a medieval music theorist. He was a Dominican friar. His origin is unknown, but he is believed to have worked in Paris at the Dominican convent on the Rue Saint-Jacques...

. The term was later redefined during the bel canto
Bel canto
Bel canto , along with a number of similar constructions , is an Italian opera term...

 period when it was identified as the lowest of three vocal registers: the chest, passaggio
Passaggio
Passaggio is a term used in classical singing to describe the pitch ranges in which vocal registration events occur. Beneath passaggio is the chest voice where any singer can produce a powerful sound, and above it lies the head voice, where a powerful and resonant sound is accessible, but usually...

 and head registers
Head voice
Head voice is a term used within vocal music. The use of this term varies widely within vocal pedagogical circles and there is currently no one consistent opinion among vocal music professionals regarding this term...

. This approach is still taught by some vocal pedagogists today.

However as knowledge of human physiology has increased over the past two hundred years, so has the understanding of the physical process of singing and vocal production. As a result, many vocal pedagogists have redefined or even abandoned the use of the term chest voice. In particular, the use of the term chest register has become controversial since vocal registration is more commonly seen today as a product of laryngeal
Larynx
The larynx , commonly called the voice box, is an organ in the neck of amphibians, reptiles and mammals involved in breathing, sound production, and protecting the trachea against food aspiration. It manipulates pitch and volume...

 function that is unrelated to the physiology of the chest and lungs. For this reason, many vocal pedagogists argue that it is meaningless to speak of registers being produced in the chest. The vibratory sensations which are felt in these areas are resonance phenomena and should be described in terms related to vocal resonance
Vocal resonation
Vocal resonation is the process by which the basic product of phonation is enhanced in timbre and/or intensity by the air-filled cavities through which it passes on its way to the outside air...

, not to registers. These vocal pedagogists prefer the term "chest voice" over the term "chest register". These vocal pedagogists also hold that many of the problems which people identify as register problems are really problems of resonance adjustment. This helps to explain the controversy over this terminology. Also, the term chest register is not used within speech pathology
Speech and language pathology
Speech-Language Pathology specializes in communication disorders.The main components of speech production include: phonation, the process of sound production; resonance, opening and closing of the vocal folds; intonation, the variation of pitch; and voice, including aeromechanical components of...

 and is not one of the four main vocal registers identified by speech pathologists. For the purposes of this article, the term "chest voice" is adopted as it is less controversial.

The contemporary use of the term chest voice often refers to a specific kind of vocal coloration or vocal timbre. In classical singing, its use is limited entirely to the lower part of the modal register
Modal voice
Modal voice is the vocal register used most frequently in speech and singing in most languages. It is also the term used in linguistics for the most common phonation of vowels...

 or normal voice. Chest timbre can add a wonderful array of sounds to a singers vocal interpretive palette. The introduction of chest timbre is common to singers trained in the historic Italian school, but largely shunned among singers who have emerged from the Nordic/Germanic tradition. Such approval or disapproval is largely an aesthetic decision.
However, the use of overly strong chest voice in the higher registers in an attempt to hit higher notes in the chest can lead to forcing. Forcing can lead consequently to vocal deterioration.

Physiological process

As the opinions on what exactly chest voice is vary greatly, there is no one consensus on the physiological production of chest voice. Here are a few opinions:

Bel canto understanding

This view understands chest voice as the vocal register used within normal speech. It was discovered via stroboscope
Stroboscope
A stroboscope, also known as a strobe, is an instrument used to make a cyclically moving object appear to be slow-moving, or stationary. The principle is used for the study of rotating, reciprocating, oscillating or vibrating objects...

 that during ordinary phonation
Phonation
Phonation has slightly different meanings depending on the subfield of phonetics. Among some phoneticians, phonation is the process by which the vocal folds produce certain sounds through quasi-periodic vibration. This is the definition used among those who study laryngeal anatomy and physiology...

, or speaking in a man the vocal folds
Vocal folds
The vocal folds, also known commonly as vocal cords, are composed of twin infoldings of mucous membrane stretched horizontally across the larynx...

 contact with each other completely during each vibration closing the gap between them fully, if just for a small length of time. This closure cuts off the escaping air. When the air pressure in the trachea rises as a result of this closure, the folds are blown apart, while the vocal processes of the arytenoid cartilages remain in apposition
Apposition
Apposition is a grammatical construction in which two elements, normally noun phrases, are placed side by side, with one element serving to define or modify the other. When this device is used, the two elements are said to be in apposition...

. This creates an oval shaped gap between the folds and some air escapes, lowering the pressure inside the trachea. Rhythmic repetition of this movement a certain number of times a second creates a pitched note. This is how the chest voice is created.

Vocal resonance understanding

This view believes that the chest voice is a product not of vocal registration but vocal resonation
Vocal resonation
Vocal resonation is the process by which the basic product of phonation is enhanced in timbre and/or intensity by the air-filled cavities through which it passes on its way to the outside air...

. Opinions within this understanding vary. Although some pedagogists believe the chest is an effective resonator, most agree that chest voice actually resonates in the head while creating vibratory sensations in the chest. Tarneaud says,

"during singing, the vibration of the vocal folds
Vocal folds
The vocal folds, also known commonly as vocal cords, are composed of twin infoldings of mucous membrane stretched horizontally across the larynx...

 impresses periodic shakes on the laryngeal
Larynx
The larynx , commonly called the voice box, is an organ in the neck of amphibians, reptiles and mammals involved in breathing, sound production, and protecting the trachea against food aspiration. It manipulates pitch and volume...

 cartilage which transmits them to the bones in the thorax
Thorax
The thorax is a division of an animal's body that lies between the head and the abdomen.-In tetrapods:...

 via the laryngeal depressors, and to the bony structures in the head via the laryngeal elevators. Singers feel these shakes in the form of thoracic and facial vibrations".

These internal phonatory
Phonation
Phonation has slightly different meanings depending on the subfield of phonetics. Among some phoneticians, phonation is the process by which the vocal folds produce certain sounds through quasi-periodic vibration. This is the definition used among those who study laryngeal anatomy and physiology...

 sensations produced by laryngeal vibrations are called "resonance" by singers and teachers of singing.

During singing in the lower register, the larynx
Larynx
The larynx , commonly called the voice box, is an organ in the neck of amphibians, reptiles and mammals involved in breathing, sound production, and protecting the trachea against food aspiration. It manipulates pitch and volume...

 is lowered since the muscles which connect it to the rib cage are tensed whereas the muscles above the larynx are not tensed. Consequently, a large proportion of the vibratory energy is transmitted to the thoracic area, giving singers the impression that their voice is resonating in the chest. This impression however is false. The chest by virtue of its design and location can make no significant contribution to the resonance system of the voice. The chest is on the wrong side of the vocal folds
Vocal folds
The vocal folds, also known commonly as vocal cords, are composed of twin infoldings of mucous membrane stretched horizontally across the larynx...

 and there is nothing in the design of the lungs that could serve to reflect sound waves back toward the larynx
Larynx
The larynx , commonly called the voice box, is an organ in the neck of amphibians, reptiles and mammals involved in breathing, sound production, and protecting the trachea against food aspiration. It manipulates pitch and volume...

.
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