Biomaterial Database

[Automated body plethysmography of respiration and voice efficiency (author's transl)]. 1979

M Moser, and G Kittel

Efficiency of voice (EV) is understood as the ratio of gained acoustic power to respiratory power during phonation. A fully automatic computer programmed to calculate the EV and the subglottic pressures via body plethysmography is described. The EV ranges from 0.5 x 10(-5) to 120 x 10(-5). The relationship between EV and sound pressure is demonstrated. The results were reproducable.

UI	MeSH Term	Description	Entries
D010993	Plethysmography, Whole Body	Measurement of the volume of gas in the lungs, including that which is trapped in poorly communicating air spaces. It is of particular use in chronic obstructive pulmonary disease and emphysema. (Segen, Dictionary of Modern Medicine, 1992)	Whole Body Plethysmography,Body Plethysmographies, Whole,Body Plethysmography, Whole,Plethysmographies, Whole Body,Whole Body Plethysmographies
D012119	Respiration	The act of breathing with the LUNGS, consisting of INHALATION, or the taking into the lungs of the ambient air, and of EXHALATION, or the expelling of the modified air which contains more CARBON DIOXIDE than the air taken in (Blakiston's Gould Medical Dictionary, 4th ed.). This does not include tissue respiration (	Breathing
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001331	Automation	Controlled operation of an apparatus, process, or system by mechanical or electronic devices that take the place of human organs of observation, effort, and decision. (From Webster's Collegiate Dictionary, 1993)	Automations
D014831	Voice	The sounds produced by humans by the passage of air through the LARYNX and over the VOCAL CORDS, and then modified by the resonance organs, the NASOPHARYNX, and the MOUTH.	Voices
D014833	Voice Quality	That component of SPEECH which gives the primary distinction to a given speaker's VOICE when pitch and loudness are excluded. It involves both phonatory and resonatory characteristics. Some of the descriptions of voice quality are harshness, breathiness and nasality.	Qualities, Voice,Quality, Voice,Voice Qualities