The vocal folds, in combination with the articulators, are capable of producing highly intricate arrays of sound. Adult male voices are usually lower-pitched and have larger folds. 17 mm and 25 mm in length. The training tenor voices pdf vocal folds are between 12.
They are flat triangular bands and are pearly white in color. The difference in vocal folds size between men and women means that they have differently pitched voices. This is not the only source of difference between male and female voice. This is mostly independent of the vocal folds themselves. Human spoken language makes use of the ability of almost all people in a given society to dynamically modulate certain parameters of the laryngeal voice source in a consistent manner.
Consequently, the muscles that control this action are among the fastest in the body. Surprisingly enough, they can learn to do this well before the age of two by listening only to the voices of adults around them who have voices much different from their own, and even though the laryngeal movements causing these phonetic differentiations are deep in the throat and not visible to them. However, voiceless speech sounds are sometimes better identified as containing an abductory gesture, even if the gesture was not strong enough to stop the vocal folds from vibrating. An adductory gesture is also identified by the change in voice spectral energy it produces. Thus, a speech sound having an adductory gesture may be referred to as a “glottal stop” even if the vocal fold vibrations do not entirely stop.
Other aspects of the voice, such as variations in the regularity of vibration, are also used for communication, and are important for the trained voice user to master, but are more rarely used in the formal phonetic code of a spoken language. The sound of each individual’s voice is entirely unique not only because of the actual shape and size of an individual’s vocal cords but also due to the size and shape of the rest of that person’s body, especially the vocal tract, and the manner in which the speech sounds are habitually formed and articulated. It is this latter aspect of the sound of the voice that can be mimicked by skilled performers. Humans have vocal folds that can loosen, tighten, or change their thickness, and over which breath can be transferred at varying pressures.
The shape of chest and neck, the position of the tongue, and the tightness of otherwise unrelated muscles can be altered. Any one of these actions results in a change in pitch, volume, timbre, or tone of the sound produced. Sound also resonates within different parts of the body, and an individual’s size and bone structure can affect somewhat the sound produced by an individual. Singers can also learn to project sound in certain ways so that it resonates better within their vocal tract. Another major influence on vocal sound and production is the function of the larynx, which people can manipulate in different ways to produce different sounds. They occur because the vocal folds are capable of producing several different vibratory patterns. The occurrence of registers has also been attributed to effects of the acoustic interaction between the vocal fold oscillation and the vocal tract.