Speech production the larynx that then is modified by the vocal tract into different vowels and consonants. However speech production can occur without the use of the lungs and glottis in alaryngeal speech by using the upper parts of the vocal tract. An example of such alaryngeal speech is Donald Duck talk. The vocal production of speech may be associated with the production of hand gestures that act to enhance the comprehensibility of what is being said. The development of speech production throughout an individual's life starts from an infant's first babble and is transformed into fully developed speech by the age
Alaryngeal speech family members" but "reported to be largely unintelligible to outsiders". Pharyngeal speech can be produced in the early stages of learning esophageal speech. However both buccal and pharyngeal speech are less clear than trained esophageal speech and "should not be regarded as a desirable or practical primary method of alaryngeal speech". A further importance is to theories of the evolution of human speech since alaryngeal speech shows that speech is not dependent entirely upon evolved anatomy as it can be created using vocal tract anatomy in an adaptive manner. Alaryngeal speech Alaryngeal speech is speech made using sources other than