title: Vertical laryngeal position and oral pressure variations during resonance tube phonation in water and in air. A pilot study.
abstract: Resonance tube phonation in water (RTPW) is commonly used in voice therapy, particularly in Finland and Sweden. The method is believed to induce a lowering of the vertical laryngeal position (VLP) in phonation as well as variations of the oral pressure, possibly inducing a massage effect. This pilot study presents an attempt to measure VLP and oral pressure in two subjects during RTPW and during phonation with the free tube end in air. VLP is recorded by means of a dual-channel electroglottograph. RTPW was found to lower VLP in the subjects, while it increased during phonation with the tube end in air. RTPW caused an oral pressure modulation with a bubble frequency of 14-22 Hz, depending mainly on the depth of the tube end under the water surface. The results indicate that RTPW lowers the VLP instantly and creates oral pressure variations.
authors.affiliation: a Faculty of Arts, Psychology and Theology, Åbo Akademi University , Turku , Finland.
authors.forename: Greta
authors.initials: G
authors.lastname: Wistbacka
authors.affiliation: b Dept. of Speech Music Hearing , School of Computer Science and Communication, KTH (Royal Institute of Technology) Stockholm , Sweden.|c College of Music Education , Stockholm , Sweden.
authors.forename: Johan
authors.initials: J
authors.lastname: Sundberg
authors.affiliation: a Faculty of Arts, Psychology and Theology, Åbo Akademi University , Turku , Finland.
authors.forename: Susanna
authors.initials: S
authors.lastname: Simberg
mesh_terms: D000328:Adult; D000388:Air; D004568:Electrodiagnosis / Q000295:instrumentation; D005260:Female; D006801:Humans; D007830:Larynx / Q000033:anatomy & histology / Q000502:physiology*; D008297:Male; D009055:Mouth / Q000033:anatomy & histology / Q000502:physiology*; D010699:Phonation; D010865:Pilot Projects; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013061:Speech Acoustics; D014160:Transducers, Pressure; D014732:Vibration; D014833:Voice Quality; D014834:Voice Training; D014867:Water
chemical_list: D014867:Water
keywords: Dual-channel electroglottograph; oral pressure; resonance tube phonation in water; vertical laryngeal position; voice therapy