Voiced lip and tongue trill technique: literature review

Abstract

The voiced lip and tongue trill technique, has broad clinical applicability and use. To better understand their application in vocal clinic, the aim of this literature review was to identify the voiced tongue and lip vibration technique on the classification, main indications, clinical results and technical performance duration. Literature search was conducted in PubMed platform, portal CAPES and Google Scholar search site. There were included original articles, literature reviews, congress proceedings, dissertations and thesis that addressed the sonorous lips or tongue vibration technique, published in the last 10 years, in Portuguese or English. There were excluded books and editorials. Articles whose technique was only cited without approach on immediate vocal or laryngeal effects, forms of use or clinical results were also excluded. Initially, were found 42 publications. After the steps of selection by title and abstract, it remained 20 original articles, 1 literature review and 5 dissertations. The publications analyzed showed that the voiced tongue and lip vibration technique is classified as an exercise of semi-occluded vocal tract, which softens the contact between the vocal folds, balances the subglottal and supraglottal pressure, optimizes the mucus-wave motion and increases vocal resistance. Its main indications are for vocal warm up, occupational use of voice, hyperkinetic dysphonia and mass lesions in the vocal folds.