On the Use of Electroglottography for Characterisation of the Laryngeal Mechanisms
نویسندگان
چکیده
In order to produce a wide range of pitches, the human vocal production is characterized by the use of four distinct laryngeal configurations. The evidence of such division is given by noticeable transitions in the audio signal, the electroglottographic signal and its derivative, during the production of a glissando. So as to avoid the confusion linked to the notion of register in singing and to bring out the difference between change in the glottis configuration (laryngeal mechanism) and adjustment of the vocal tract (resonance register), the following terminology is proposed: mechanism 0 (”vocal fry”), mechanism I (”modal” or ”chest” register), mechanism II (”falsetto” for male voice and ”head” register for female voice) and mechanism III (”whistle” register). A shape description of the electroglottographic signal (EGG) and its derivative (DEGG) is provided in the case of the four laryngeal mechanisms and the strong correlation between electroglottography-based open quotient measurements and laryngeal mechanisms is illustrated. The possibilities and limitations of using the electroglottography in order to detect a given laryngeal mechanism are discussed.
منابع مشابه
Safe Use of Flammable Endotracheal Tubes During Anesthesia for Laryngeal Laser Surgery-Report of 1024 Cases and a Brief Literature Review
Introduction: One of the major concerns in laryngeal laser surgery is the risk of airway fire. The introduction ofwrapped tubes and metal tubes has reduced the fire hazards. However, these tubes are expensive and do not provide convenient access to the surgical field. There are few laboratory studies addressing the resistance of polyvinylchloride tubes against ignition in the given circum...
متن کاملVocal tract resonances in singing: variation with laryngeal mechanism for male operatic singers in chest and falsetto registers.
Seven male operatic singers sang the same notes and vowels in their chest and their falsetto registers, covering the overlap frequency range where two main laryngeal mechanisms can be identified by means of electroglottography: M1 in chest register and M2 in falsetto register. Glottal contact quotients determined using electroglottography were typically lower by 0.27 in M2 than in M1. Vocal tra...
متن کاملCase Report of an open Neck Procedure Complication Associated with Laryngeal Mask Airway Use
Introduction: The laryngeal mask airway (LMA) is a safe method to establish airway control during general anaesthesia. In otolaryngology surgery, the use of a LMA is well established in ear surgery; however, the use of a LMA during open neck procedures remains controversial. We report a case in which the pharyngeal distortion by the LMA cuff resulted in an iatrogenic complication. Case Report...
متن کاملVocal tract resonances in singing: Variation with laryngeal mechanism for male operatic singers in chest and falsetto registers
Seven male operatic singers sang the same notes and vowels in their chest and their falsetto registers, covering the overlap frequency range where two main laryngeal mechanisms can be identified by means of electroglottography: M1 in chest register and M2 in falsetto register. Glottal contact quotients determined using electroglottography were typically lower by 0.27 in M2 than in M1. Vocal tra...
متن کاملSynthesis, Characterisation and Flocculation Properties of Carboxymethyl Cellulose-g Acrylamide
Graft copolymers of acrylamide on carboxymethyl cellulose (d.s 0.4-0.5) were prepared by the use of ceric ion, ceric ion/reductant molecule initiator systems in aqueous medium. The graft copolymers were characterized by IR spectroscopy. The extent of graft copolymerisation was measured in terms of grafted chains as a function of both ceric ion and ceric ion/reductant molecule concentrations. It...
متن کامل