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Singing is the production of musical tones by the human voice with or without words. Singing is a natural form of expression found in cultures and societies throughout the world.
Singing may
be accompanied by instrumental music, or it may be a
cappella (without instrumental accompaniment). This article
discusses how people sing, the major voice classifications, and voice training
for the individual singer. For information on group singing, see Classical music (Choral music).
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How people sing. Singing is produced in the same
general way that a musical wind instrument creates sound—by causing a column of
air to vibrate. A person sings by drawing air into the lungs and exhaling it
past the vocal cords.
The vocal cords are two folds of tissue that stretch across the larynx (voice box) in the
throat. The movement of the air against the vocal cords and the surface of the
throat and mouth causes vibrations that create the sound of the voice.
Because the vocal cords are elastic,
the pitch of tones produced when the cords vibrate may be varied, depending on
the degree of tension. The more tightly the vocal cords are stretched, the
higher the pitch. The more relaxed the vocal cords, the lower the pitch. A
man's vocal cords tend to be longer, wider, and thicker than those of a woman.
As a result, a man's-voice tends to be an octave or more lower than a woman's
voice.
Voice
classification. Both men's and women's voices fall into three general categories
of pitch—high, middle, and low. Within these categories, voices are classified
into six basic types. From highest to lowest in pitch, they are soprano, mezzo-soprano, and
contralto for women; and tenor, baritone, and bass for men. Most voices
belong in the mezzo-soprano and baritone categories. See also Opera.
(The singers).
Training
the voice. Singing is a natural function and it requires no training to
perform simple music. But serious singing makes special demands on the voice.
Therefore, a singer requires special training to perform opera and other
difficult music. Singers study and train to develop and improve four basic
singing skills: (1) breath control, (2) a broad range, (3) smoothness
throughout the range, and (4) good resonance.
Breath
control allows a singer to perform long musical phrases in a single
breath. The singer learns to breathe freely and naturally, filling the lungs
from the bottom upward and expanding the chest cavity so that the lungs take in
the maximum amount of air. The singer must learn how to release the air with
evenly controlled pressure. The actions of muscles in the abdomen and chest
cavities help the singer to achieve this goal.
A
broad range allows a singer to correctly produce a wide span of notes from
low to high. The singer's range determines his or her voice category. Training
helps singers to produce the easy mid-range tones comfortably, and also the
highest and lowest tones of which they are capable. Most untrained people can
sing over a range of about 1} octaves or less. But trained singers usually have
a range of about two octaves.
Smoothness
throughout the range means that a singer produces no audible breaks
in the voice when moving from one tone to another. Some experts believe the
voice is composed of either two or three registers
(groups of tones within, the range). They believe that the
untrained singer whose voice breaks is moving from one register to another at
the moment of the break. However, other experts believe that the entire range
is composed of only one register, and that breaks result from other causes. All
agree that the singer should be able to sing smoothly throughout the range,
with no abrupt changes in the quality of the tone.
Good
resonance strengthens and beautifies the tone. Resonance takes place as the
tone vibrates in the cavities of the throat, mouth, chest, and face. Resonance
occurs naturally and cannot be directly controlled by the singer. However, to
allow this action to take place, the singer learns to open the throat by
relaxing the throat muscles. The singer also learns how to relax the jaw and
lips and where to properly place the tongue.
Other
singing skills. Singers should learn to read music notation
(the signs and symbols) and understand music terms. For example, where
the term messa di voce
appears, the voice must increase the volume gradually
from pianissimo
(very soft) to fortissimo
(very loud), and then back again. Singers also learn how
to sing trills,
whiGh
are quick alternations of two adjacent
musical tones, and how to control vibrato, a vibrating sound
made up of slight, rapid changes
in pitch. Clear diction (speech)
is important so the lyrics can be understood.
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