La voz (del latín vox, vocis) se refiere, entre otras acepciones, «al sonido que el aire expelido de los pulmones produce al salir de la laringe, haciendo que vibren las cuerdas vocales», además de la «calidad, timbre o intensidad de este sonido». Consiste en el sonido producido por un ser humano haciendo uso de sus cuerdas vocales para hablar, cantar, reírse, gritar, chillar, etc. Su frecuencia oscila entre alrededor de 60 a 7000 Hz. Simplificando, el aparato fonador para generar la voz humana consiste en el órganos de respiración (las cavidades infraglóticas, es decir, pulmones, bronquios y tráquea); los órganos de fonación (las cavidades glóticas, es decir, laringe, cuerdas vocales y resonadores -nasal, bucal y faríngeo) y los órganos de articulación (las cavidades supraglóticas, es decir, paladar, lengua, dientes, labios y glotis).

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Voice or voicing is a term used in phonetics and phonology to characterise speech sounds (usually consonants), with sounds described as either voiceless (also called unvoiced) or voiced. The term, however, is used to refer to two separate concepts: \n* Voicing can refer to the articulatory process in which the vocal cords vibrate, its primary use in phonetics to describe phones, which are particular speech sounds. \n* It can also refer to a classification of speech sounds that tend to be associated with vocal cord vibration but may not actually be voiced at the articulatory level. That is the term's primary use in phonology to describe phonemes or in phonetics to describe phones. At the articulatory level, a voiced sound is one in which the vocal cords vibrate, and a voiceless sound is one in which they do not. For example, voicing accounts for the difference between the pair of sounds associated with the English letters "s" and "z". The two sounds are transcribed as [s] and [z] to distinguish them from the English letters, which have several possible pronunciations, depending on the context. If one places the fingers on the voice box (i.e. the location of the Adam's apple in the upper throat), one can feel a vibration while zzzz is pronounced but not with ssss. (For a more detailed, technical explanation, see modal voice and phonation.) In most European languages, with a notable exception being Icelandic, vowels and other sonorants (consonants such as m, n, l, and r) are modally voiced. When used to classify speech sounds, voiced and unvoiced are merely labels used to group phones and phonemes together for the purposes of classification.

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