scholarly journals Analysis of pressure-flow data in terms of computer-derived urethral resistance parameters

1995 ◽  
Vol 13 (1) ◽  
pp. 40-46 ◽  
Author(s):  
R. van Mastrigt ◽  
M. Kranse
Keyword(s):  
Flow Data ◽  
Pressure Flow ◽  
Urethral Resistance

Pressure-Flow Measurements for Selected Oral and Nasal Sound Segments Produced by Normal Adults

1992 ◽  
Vol 29 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Meri L. Andreassen ◽  
Bonnie E. Smith ◽  
Thomas W. Guyette
Keyword(s):  
Limited Information ◽  
Flow Data ◽  
Female Adult ◽  
Flow Measurements ◽  
Pressure Flow ◽  
Orifice Area ◽  
Normative Pressure ◽  
Categorization Scheme ◽  
Velopharyngeal Function ◽  
Normal Adults

Pressure-flow data are often used to provide information about the adequacy of velopharyngeal valving for speech. However, there is limited information available concerning simultaneous pressure-flow measurements for oral and nasal sound segments produced by normal speakers. This study provides normative pressure, flow, and velopharyngeal orifice area measurements for selected oral and nasal sound segments produced by 10 male and 10 female adult speakers. An aerodynamic categorization scheme of velopharyngeal function, including one typical category and three atypical categories (open, closed, and mixed) is proposed.

Perceptual Evaluation of Velopharyngeal Competency

1980 ◽  
Vol 89 (5_suppl) ◽  
pp. 153-157 ◽  
Author(s):  
Betty Jane Philips
Keyword(s):  
Public School ◽  
Education And Training ◽  
Flow Data ◽  
Speech Language Pathologists ◽  
Pressure Flow ◽  
Perceptual Evaluation ◽  
Speech Characteristics ◽  
Velopharyngeal Incompetence ◽  
And Training

Eight public school speech/language pathologists estimated velopharyngeal competence on the basis of perceptual evaluation of speech characteristics of 24 subjects. These evaluations were made from tape-recorded speech samples. After orientation to a system for scoring speech characteristics associated with velopharyngeal incompetence they reevaluated the same 24 subjects. The evaluations were found to improve significantly with orientation and to correlate well with experts' live evaluations as well as evaluations based on instrumentation which included telefluorography, manometric and pressure-flow data. It was concluded that speech/language pathologists, who by nature of their education and training have expertise in identification of speech deviations, can apply their skills effectively in identifying velopharyngeal incompetence. Further it was suggested that orientation to a system for weighing speech characteristics related to velopharyngeal competency can improve their estimates.

Analysis of Venturi Performance for Gas-Particle Flows

1990 ◽  
Vol 112 (1) ◽  
pp. 121-127 ◽  
Author(s):  
F. D. Shaffer ◽  
R. A. Bajura
Keyword(s):  
Single Phase ◽  
Stokes Number ◽  
Differential Pressure ◽  
Mass Loading ◽  
Flow Data ◽  
Basic Principles ◽  
Pressure Flow ◽  
Experimental Calibration ◽  
Particle Flows ◽  
Improve Correlation

In recent years, use of the venturi for measurement of gas-particle flows has received considerable attention. The technology for the venturi as a single-phase flowmeter has matured to the point that application is routine. Much more research, however, is required to establish the venturi as an acceptable gas-particle flowmeter. The first part of this paper consists of a discussion of the basic principles of venturi pressure-flow performance for gas-particle flows. This is followed by a description of the experimental calibration of a venturi for measurement of gas-particle flows with particle-to-gas mass-loading ratios up to 35. Next, a modified Stokes number is presented and shown to improve correlation of venturi pressure-flow data. Finally, the predictions of a model presented by Doss are compared with the pressure-flow data of the venturi calibration performed in this work. The Doss model provides good predictions of venturi differential pressures for particle-to-gas mass-loading ratios less than ten but tends to overpredict the differential pressure, by as much as 45 percent, for particle-to-gas mass-loading ratios above 10.

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