A Better Understanding of Esophageal Speech Excitation Source Behavior

2013 ◽  
Keyword(s):  
Excitation Source ◽  
Esophageal Speech

Airway Resistance during Esophageal Phonation

1982 ◽  
Vol 47 (2) ◽  
pp. 194-199 ◽  
Author(s):  
Bernd Weinberg ◽  
Yoshiyuki Horii ◽  
Eric Blom ◽  
Mark Singer
Keyword(s):  
Speech Production ◽  
Airway Resistance ◽  
Voice Restoration ◽  
Esophageal Speech ◽  
Airways Resistance ◽  
Restoration Method

Prosthesis airway resistance calculations were completed for five Blom-Singer prostheses and esophageal source airway resistance estimated were made of five laryngectomized patients using the Singer-Blom voice restoration method. Airway resistance of the Blom-Singer prostheses ranged from 46 to 121 cmH 2 O/LPS, while source airways resistance in these subjects ranged from about 155 to 270 cmH 2 O/LPS. These results revealed that the opposition of the voicing sources used in esophageal speech production to airflow through them is substantial and larger than that established for the normal, laryngeal source. Findings are interpreted to highlight major advantages the Singer-Blom (1980) method of speech/voice restoration has over esophageal speech/voice produced on a conventional basis and to reveal specific reasons for the failure of may laryngectomized patients to develop consistent voice and functionally serviceable speech.

Esophageal Speech

2018 ◽  
Vol 69 (2) ◽  
pp. 95-95
Author(s):  
I. Uemaetomari
Keyword(s):  
Esophageal Speech

Micro- Inductively Coupled Plasma as Excitation Source Used for Qualitative Analysis of Gas Sample

2013 ◽  
Vol 41 (12) ◽  
pp. 1923
Author(s):  
Yong-Qing WANG ◽  
Jin-E LI ◽  
Ying-Chang ZHOU ◽  
Rong-Xia SUN ◽  
Na CHONG
Keyword(s):  
Qualitative Analysis ◽  
Inductively Coupled Plasma ◽  
Excitation Source ◽  
Inductively Coupled

Cross Double Point Discharge as Enhanced Excitation Source for Highly Sensitive Determination of Arsenic, Mercury and Lead by Optical Emission Spectrometry

2021 ◽  
Author(s):  
Lin He ◽  
Peixia Li ◽  
Kai Li ◽  
Tao Lin ◽  
Jin Luo ◽  
...  
Keyword(s):  
Double Point ◽  
Hydride Generation ◽  
Optical Emission ◽  
Sample Introduction ◽  
Excitation Source ◽  
Emission Spectrometry ◽  
Highly Sensitive ◽  
Point Discharge ◽  
Sensitive Determination

A new cross double point discharge (CrossPD) microplasma was designed as an excitation source to construct a miniaturized optical emission spectrometer with hydride generation (HG) for sample introduction. The CrossPD...

scholarly journals A physico-chemical model to study the ion density distribution in the inner coma of comet C/2016 R2 (Pan-STARRS)

2020 ◽  
Author(s):  
Susarla Raghuram ◽  
Anil Bhardwaj ◽  
Damien Hutsemékers ◽  
Cyrielle Opitom ◽  
Jean Manfroid ◽  
...  
Keyword(s):  
Density Distribution ◽  
Electron Impact ◽  
Emission Intensity ◽  
Impact Ionization ◽  
Excitation Source ◽  
Resonance Fluorescence ◽  
Ion Density ◽  
Physico Chemical ◽  
Intensity Ratios ◽  
Ion Emission

Abstract The recent observations show that comet C/2016 R2 (Pan-Starrs) has a unique and peculiar composition when compared with several other comets observed at 2.8 au heliocentric distance. Assuming solar resonance fluorescence is the only excitation source, the observed ionic emission intensity ratios are used to constrain the corresponding neutral abundances in this comet. We developed a physico-chemical model to study the ion density distribution in the inner coma of this comet by accounting for photon and electron impact ionization of neutrals, charge exchange and proton transfer reactions between ions and neutrals, and electron-ion thermal recombination reactions. Our calculations show that CO$_2^+$ and CO+ are the major ions in the inner coma, and close to the surface of nucleus CH3OH+, CH3OH$_2^+$ and O$_2^+$ are also important ions. By considering various excitation sources, we also studied the emission mechanisms of different excited states of CO+, CO$_2^+$, N$_2^+$, and H2O+. We found that the photon and electron impact ionization and excitation of corresponding neutrals significantly contribute to the observed ionic emissions for radial distances smaller than 300 km and at larger distances, solar resonance fluorescence is the major excitation source. Our modelled ion emission intensity ratios are consistent with the ground-based observations. Based on the modelled emission processes, we suggest that the observed ion emission intensity ratios can be used to derive the neutral composition in the cometary coma only when the ion densities are significantly controlled by photon and photoelectron impact ionization of neutrals rather than by the ion-neutral chemistry.

Comparison of the He–Ne Laser with the Hg 4358 and 5461 Å Lines as a Raman Excitation Source

1966 ◽  
Vol 56 (11) ◽  
pp. 1638 ◽  
Author(s):  
M. V. Evans ◽  
T. M. Hard ◽  
W. F. Murphy
Keyword(s):  
Excitation Source
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