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The human voice consists of sound made by a human being using the vocal tract, including talking, singing, laughing, crying, screaming, shouting, humming or yelling. The human voice frequency is specifically a part of human sound production in which the vocal folds (vocal cords) are the primary sound source.
Speech and language disorders commonly include communication issues, but also extend into various areas such as oral-motor function—sucking, swallowing, drinking, or eating. In some cases, a child's communication is delayed considerably behind his/her same-aged peers.
Gleason (2001) defines a communication disorder as a speech and language disorder which refers to problems in communication and in related areas such as oral motor function. The delays and disorders can range from simple sound substitution to the inability to understand or use one's native language. [3]
Speech skills are vital to social relationships and learning, and delays or disorders that relate to developing these skills can impact individuals function. [3] For many children and adolescents, this can present as issues with academics. [4] Speech disorders affect roughly 11.5% of the US population, and 5% of the primary school population. [5]
Developmental verbal dyspraxia (DVD), also known as childhood apraxia of speech (CAS) and developmental apraxia of speech (DAS), [1] is a condition in which an individual has problems saying sounds, syllables and words. This is not because of muscle weakness or paralysis.
Voice disorders [1] are medical conditions involving abnormal pitch, loudness or quality of the sound produced by the larynx and thereby affecting speech production. These include: Vocal fold nodules; Vocal fold cysts; Vocal cord paresis; Reinke's edema; Spasmodic dysphonia; Foreign accent syndrome; Bogart–Bacall syndrome; Laryngeal ...
Voice therapy consists of techniques and procedures that target vocal parameters, such as vocal fold closure, pitch, volume, and quality. This therapy is provided by speech-language pathologists and is primarily used to aid in the management of voice disorders, [1] or for altering the overall quality of voice, as in the case of transgender voice therapy.
NCVS members, although geographically separate, were linked by a common desire to fully understand the characteristics, limitations and enhancement of human voice and speech. In 1999, NIDCD discontinued the Multi-Purpose Research and Training Center funding mechanism for the entire institute focusing instead on single-project research awards ...