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The vocal folds are commonly referred to as vocal cords, and less commonly as vocal flaps or vocal bands. The term vocal cords was coined by the French anatomist Antoine Ferrein in 1741. In his violin analogy of the human voice, he postulated that the moving air acted like a bow on cordes vocales. [43]
Adult male voices are usually lower-pitched and have larger folds. The male vocal folds (which would be measured vertically in the opposite diagram), are between 17 mm and 25 mm in length. [10] The female vocal folds are between 12.5 mm and 17.5 mm in length. The folds are within the larynx.
Vocal pedagogists may use the term vocal register to refer to any of the following: [2] A labeled anatomical diagram of the vocal folds or cords. a particular part of the vocal range such as the upper, middle, or lower registers; a resonance area such as chest voice or head voice; a phonatory process; a certain vocal timbre
The lower pair of folds are known as the vocal cords, which produce sounds needed for speech and other vocalizations. The slit-like space between the left and right vocal cords, called the rima glottidis, is the narrowest part of the larynx. The vocal cords and the rima glottidis are together designated as the glottis.
The free edge of the vibratory portion of the vocal fold, the anterior glottis, is covered with stratified squamous epithelium. This epithelium is five to twenty-five cells thick with the most superficial layer consisting of one to three cells that are lost to abrasion of the vocal folds during the closed phase of vibration.
Voiced speech is produced by air streaming from the lungs through the vocal cords, setting them into an oscillating movement. [6] [7] In every oscillation, the vocal folds are closed for a short period of time. When the folds reopen the pressure under the folds is released. These changes in pressure form the waves called (voiced) speech.
Accompanied by breath under lung pressure, the glottis and vocal folds move in an open-close motion. During the opening and closing, the process by which the vocal folds meet is referred to as phonation (non-technically called vocalization), which is the general function of how vocal sound is produced. During phonation, vibratory cycles occur ...
It is to the vestibular ligaments (vestibular folds once covered with mucous membrane) what the rima glottidis is to the vocal ligaments (vocal folds once covered with mucous membrane) – the space formed when the folds are separated. It can be defined as the space in between the false vocal cords, and allows air to pass through the larynx.