Dynamic Characteristics of Air‐Pressure Measuring Systems Used in Speech Research

1971 ◽  
Vol 50 (4A) ◽  
pp. 1051-1057 ◽  
Author(s):  
Terry D. Edmonds ◽  
David J. Lilly ◽  
James C. Hardy
Keyword(s):  
Dynamic Characteristics ◽  
Air Pressure ◽  
Measuring Systems ◽  
Speech Research

Construction of a nonlinear dynamic characteristic model of pneumatic artificial rubber muscle manipulator using the magnetorheological (MR) brake

2012 ◽  
Vol 23 (9) ◽  
pp. 1011-1018 ◽  
Author(s):  
Hiroki Tomori ◽  
Yuichiro Midorikawa ◽  
Taro Nakamura
Keyword(s):  
Dynamic Characteristic ◽  
Dynamic Characteristics ◽  
Nonlinear Dynamic ◽  
Magnetorheological Fluid ◽  
Early Response ◽  
Air Pressure ◽  
Late Response ◽  
Control Performance ◽  
Characteristic Model ◽  
Nonlinear Dynamic Characteristic

An artificial rubber muscle as an actuator was paid attention in this study because the manipulator was found to be safe to human when it comes in contact with human. However, this actuator vibrates easily with a late response because of the applied air pressure. Then, the magnetorheological brake that uses the magnetorheological fluid with an early response is built into the joint and controls the vibration. In this article, we have grasped the dynamic characteristics of a manipulator by the construction of a model for improvement in the control performance of the magnetorheological brake. Furthermore, the simulation was performed using the model, and efficient braking of the magnetorheological brake was examined.

An Analysis of the Dynamic Characteristics of a Force Plate

1972 ◽  
Vol 5 (3) ◽  
pp. 102-106 ◽  
Author(s):  
J P Marsden ◽  
S R Montgomery
Keyword(s):  
Dynamic Characteristics ◽  
Ground Reaction Force ◽  
Total Mass ◽  
Damping Ratio ◽  
Reaction Force ◽  
Force Plate ◽  
The Body ◽  
Measuring Systems ◽  
Future Design ◽  
Plate System

Experiments have been performed in which the ground reaction force during walking has been measured simultaneously by two different means; a shoe having a spring-loaded heel and fitted with a transducer was worn by subjects walking over a force plate. Discrepancies in the two sets of results led to an analysis of the dynamic characteristics of the force plate which was facilitated by comparing the results of the two measuring systems. The increase in the total mass of the system as the body lands on the plate reduces both the damping ratio and the natural frequency of the force plate system, causing an increase in the dynamic magnification. These effects are analysed quantitatively and recommendations are made for the future design of force plate systems.

Dynamic Characteristics of Centrifugal Fan Impeller Based on Fluid-Solid Coupling

2012 ◽  
Vol 580 ◽  
pp. 437-440
Author(s):  
Mei Liu
Keyword(s):  
Unsteady Flow ◽  
Modal Analysis ◽  
Fatigue Failure ◽  
Dynamic Characteristics ◽  
Pressure Fluctuation ◽  
Natural Frequencies ◽  
Air Pressure ◽  
Centrifugal Fan ◽  
Main Frequency ◽  
Blade Passing Frequency

The non pre-stressing and pre-stressing modal analysis for impeller were computed by software ANSYS, and the unsteady flow for centrifugal fan was simulated by software CFX, at the same time the air pressure around the impeller was obtained. The results show that, the pre-stressing effect will improve the values of natural frequencies of impeller, but the increased values of the natural frequencies are different, the main frequency of air pressure fluctuation around the impeller is equal to the blade passing frequency of impeller, and it will not caused the danger of fatigue failure of impeller.

Speech Airflow and Air-Pressure Signal Editing Platform

2014 ◽  
Vol 989-994 ◽  
pp. 3667-3670
Author(s):  
Shi Liang Lv ◽  
Ya Sheng Jin
Keyword(s):  
Program Analysis ◽  
Acoustic Analysis ◽  
Air Pressure ◽  
Perceptual Field ◽  
Pressure Signal ◽  
Physiological Signal ◽  
Equipment Acquisition ◽  
Speech Aerodynamics ◽  
Speech Research ◽  
Analysis Platform

Experimental phonetics development to today has undergone a long and complicated process. The field of study from the acoustic analysis of expansion to the physiological and perceptual field. Speech aerodynamics signal is one of the most important physiological signal language research, plays an important role in human phonation process. Air pressure signal as an important physiological signal, which has great significance to the study of speech physiology, mainly through speech aerodynamics equipment acquisition. In this paper, according to the need of research, established by MATLAB program analysis platform, can be edited on the speech, the airflow and pressure signal is better, which is more suitable for speech research.

Signal Interpretation Considerations When Estimating Subglottal Pressure From Oral Air Pressure

2019 ◽  
Vol 62 (5) ◽  
pp. 1326-1337 ◽  
Author(s):  
Brittany L. Perrine ◽  
Ronald C. Scherer ◽  
Jason A. Whitfield
Keyword(s):  
Standard Condition ◽  
Word Production ◽  
Air Pressure ◽  
Pressure Waveform ◽  
Pressure Measurements ◽  
Air Leak ◽  
Pressure Signal ◽  
Adult Participants ◽  
Syllable Repetition ◽  
Subglottal Pressure

Purpose Oral air pressure measurements during lip occlusion for /pVpV/ syllable strings are used to estimate subglottal pressure during the vowel. Accuracy of this method relies on smoothly produced syllable repetitions. The purpose of this study was to investigate the oral air pressure waveform during the /p/ lip occlusions and propose physiological explanations for nonflat shapes. Method Ten adult participants were trained to produce the “standard condition” and were instructed to produce nonstandard tasks. Results from 8 participants are included. The standard condition required participants to produce /pːiːpːiː.../ syllables smoothly at approximately 1.5 syllables/s. The nonstandard tasks included an air leak between the lips, faster syllable repetition rates, an initial voiced consonant, and 2-syllable word productions. Results Eleven oral air pressure waveform shapes were identified during the lip occlusions, and plausible physiological explanations for each shape are provided based on the tasks in which they occurred. Training the use of the standard condition, the initial voice consonant condition, and the 2-syllable word production increased the likelihood of rectangular oral air pressure waveform shapes. Increasing the rate beyond 1.5 syllables/s improved the probability of producing rectangular oral air pressure signal shapes in some participants. Conclusions Visual and verbal feedback improved the likelihood of producing rectangular oral air pressure signal shapes. The physiological explanations of variations in the oral air pressure waveform shape may provide direction to the clinician or researcher when providing feedback to increase the accuracy of estimating subglottal pressure from oral air pressure.

Cinefluorographic Speech Research

1961 ◽  
Vol 4 (2) ◽  
pp. 171-171
Author(s):  
Ralph L. Shelton
Keyword(s):  
Speech Research
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