keyword
MENU ▼
Read by QxMD icon Read
search

Vocal tract

keyword
https://www.readbyqxmd.com/read/28408141/the-effects-of-heel-height-on-head-position-long-term-average-spectra-and-perceptions-of-female-singers
#1
Amelia A Rollings
Female singers often wear high heels for auditions and performances. Heel height research in non-singing contexts indicates that wearing heels can affect body alignment and head position. Studies in orthodontics, sleep apnea, and voice science suggest that head and neck positioning can alter the vocal tract. The purpose of this study was to assess the effects, if any, of heel height (barefoot, 10.16-cm stilettos) on three angles of singer head position (calculated from C7-tragus-nasion), long-term average spectra data, and perceptual data (questionnaire) acquired from female (N = 30) soloists during alternating periods of silence and singing...
April 10, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28392085/voice-handicap-index-and-interpretation-of-the-cutoff-points-using-receiver-operating-characteristic-curve-as-screening-for-young-adult-female-smokers
#2
Dionysios Tafiadis, Evangelia I Kosma, Spyridon K Chronopoulos, Aggelos Papadopoulos, Konstantinos Drosos, Vassiliki Siafaka, Eugenia I Toki, Nausica Ziavra
The relationship between smoking and alterations of the vocal tract and larynx is well known. This pathology leads to the degradation of voice performance in daily living. Multiple assessment methods of vocal tract and larynx have been developed, and in recent years they were enriched with self-reported questionnaires such as Voice Handicap Index (VHI). This study determined the cutoff points of VHI's total score and its three domains for young female smokers in Greece. These estimated cutoff points could be used by voice specialists as an indicator for further clinical evaluation (foreseeing a potential risk of developing a vocal symptom because of smoking habits)...
April 6, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28382115/nasalance-changes-following-various-endonasal-surgeries
#3
Hazem Saeed Amer, Ahmed Shaker Elaassar, Ahmad Mohammad Anany, Amal Saeed Quriba
Introduction There is change in nasalance post endonasal surgery which is not permanent. Objectives The objective of this study is to evaluate the long-term nasalance changes following different types of endonasal surgeries. Methods We included in this study patients who underwent sinonasal surgery at the Otorhinolaryngology Department in Zagazig University Hospitals from February 2015 until March 2016. We divided the patients into two groups according to the surgeries they underwent: Group (A) was the FESS group and group (B), the septoturbinoplasty group...
April 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28372130/the-relation-between-tongue-shape-and-pitch-in-clarinet-playing-using-ultrasound-measurements
#4
Steven M Lulich, Sherman Charles, Benjamin Lulich
Tongue shapes during clarinet performances of chromatic scale, portamento and pitch bending exercises were imaged using an ultrasound machine while audio and video were recorded synchronously. Analysis of the data from four participants revealed that tongue position varies non-monotically with note frequency in the lowest register (up to ≈ 440 Hz) and then descends monotonically as note frequencies rise through the upper registers. The descent of the tongue results in an expansion of the vocal tract's posterior oral cavity, resulting in a vocal tract input impedance maximum tuned to high frequency...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28372118/effects-of-tongue-position-in-the-simplified-vocal-tract-model-of-japanese-sibilant-fricatives-s-and-%C3%AA
#5
Tsukasa Yoshinaga, Kazunori Nozaki, Shigeo Wada
The effects of tongue position on sound properties were investigated by using simplified models of sibilant fricatives /s/ and /ʃ/. These were constructed from medical images of a native Japanese-speaking subject who pronounced both fricative sounds. The sounds generated by the models were experimentally measured and compared with the subjects /s/ and /ʃ/. The position of tongue models altered the main peak frequency and spectral mean of the generated sound, which resulted in the reproduction of frequency characteristics of /s/ or /ʃ/ with the subjects tongue position...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28372071/the-role-of-vocal-tract-and-subglottal-resonances-in-producing-vocal-instabilities
#6
Laura Wade, Noel Hanna, John Smith, Joe Wolfe
During speech and singing, the vibrating vocal folds are acoustically loaded by resonant ducts upstream (the trachea) and downstream (the vocal tract). Some models suggest that the vocal fold vibration (at frequency fo) is more stable at frequencies below that of a vocal tract resonance, so that the downstream load is inertive (mass-like). If so, vocal fold vibration might become unstable when fo and resonance frequencies "cross over" and the load varies rapidly in phase and magnitude. In one experiment, singers produced a slow diphthong at constant pitch, thus shifting the first tract resonance R1 across fixed fo...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28372057/a-study-of-voice-production-characteristics-of-astronuat-speech-during-apollo-11-for-speaker-modeling-in-space
#7
Chengzhu Yu, John H L Hansen
Human physiology has evolved to accommodate environmental conditions, including temperature, pressure, and air chemistry unique to Earth. However, the environment in space varies significantly compared to that on Earth and, therefore, variability is expected in astronauts' speech production mechanism. In this study, the variations of astronaut voice characteristics during the NASA Apollo 11 mission are analyzed. Specifically, acoustical features such as fundamental frequency and phoneme formant structure that are closely related to the speech production system are studied...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28367052/articulating-what-infants-attune-to-in-native-speech
#8
Catherine T Best, Louis M Goldstein, Hosung Nam, Michael D Tyler
To become language users, infants must embrace the integrality of speech perception and production. That they do so, and quite rapidly, is implied by the native-language attunement they achieve in each domain by 6-12 months. Yet research has most often addressed one or the other domain, rarely how they interrelate. Moreover, mainstream assumptions that perception relies on acoustic patterns whereas production involves motor patterns entail that the infant would have to translate incommensurable information to grasp the perception-production relationship...
October 1, 2016: Ecological Psychology: a Publication of the International Society for Ecological Psychology
https://www.readbyqxmd.com/read/28362810/a-comparison-of-sampling-methods-for-examining-the-laryngeal-microbiome
#9
Alissa S Hanshew, Marie E Jetté, Stephanie Tadayon, Susan L Thibeault
Shifts in healthy human microbial communities have now been linked to disease in numerous body sites. Noninvasive swabbing remains the sampling technique of choice in most locations; however, it is not well known if this method samples the entire community, or only those members that are easily removed from the surface. We sought to compare the communities found via swabbing and biopsied tissue in true vocal folds, a location that is difficult to sample without causing potential damage and impairment to tissue function...
2017: PloS One
https://www.readbyqxmd.com/read/28355385/vocal-tract-discomfort-in-teachers-after-teaching-activity
#10
Amanda Corrêa do Amaral, Fabiana Zambon, Felipe Moreti, Mara Behlau
Purpose To evaluate the vocal tract discomfort (VTD) reported by teachers, comparing their vocal self-assessment at three different times: before teaching, after four hours of teaching, and after eight hours of teaching. Methods The study sample was composed of 50 teachers: 42 women and eight men. The participating teachers were divided into two groups according to the cutoff value of the Voice Symptom Scale (VoiSS): Vocal Risk Group (VRG) and Vocally Healthy Group (VHG). The List of Vocal Signs and Symptoms (LVSS) was used to identify the number of vocal symptoms in each group...
2017: CoDAS
https://www.readbyqxmd.com/read/28345678/laryngeal-manual-therapy-palpatory-evaluation-scale-a-preliminary-study-to-examine-its-usefulness-in-diagnosis-of-occupational-dysphonia
#11
Ewelina Woźnicka, Ewa Niebudek-Bogusz, Joanna Morawska, Justyna Wiktorowicz, Mariola Śliwińska-Kowalska
BACKGROUND: The aim of this study has been to assess the larynx and soft tissue around the vocal tract in a group of people with healthy voice, and in a group of patients with occupational dysphonia using the new laryngeal manual therapy palpatory evaluation scale (LMTPE). MATERIAL AND METHODS: The examinations were performed in a study (dysphonic) group of professional voice users who had developed voice disorders (N = 51) and in the control group of normophonic subjects (N = 50)...
March 24, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28334401/vocal-tract-images-reveal-neural-representations-of-sensorimotor-transformation-during-speech-imitation
#12
Daniel Carey, Marc E Miquel, Bronwen G Evans, Patti Adank, Carolyn McGettigan
Imitating speech necessitates the transformation from sensory targets to vocal tract motor output, yet little is known about the representational basis of this process in the human brain. Here, we address this question by using real-time MR imaging (rtMRI) of the vocal tract and functional MRI (fMRI) of the brain in a speech imitation paradigm. Participants trained on imitating a native vowel and a similar nonnative vowel that required lip rounding. Later, participants imitated these vowels and an untrained vowel pair during separate fMRI and rtMRI runs...
March 18, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28314241/characterizing-articulation-in-apraxic-speech-using-real-time-magnetic-resonance-imaging
#13
Christina Hagedorn, Michael Proctor, Louis Goldstein, Stephen M Wilson, Bruce Miller, Maria Luisa Gorno-Tempini, Shrikanth S Narayanan
Purpose: Real-time magnetic resonance imaging (MRI) and accompanying analytical methods are shown to capture and quantify salient aspects of apraxic speech, substantiating and expanding upon evidence provided by clinical observation and acoustic and kinematic data. Analysis of apraxic speech errors within a dynamic systems framework is provided and the nature of pathomechanisms of apraxic speech discussed. Method: One adult male speaker with apraxia of speech was imaged using real-time MRI while producing spontaneous speech, repeated naming tasks, and self-paced repetition of word pairs designed to elicit speech errors...
March 17, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28255915/microbiologic-methods-in-the-diagnostics-of-upper-respiratory-tract-pathogens
#14
J Kompanikova, A Zumdick, M Neuschlova, V Sadlonova, E Novakova
Upper respiratory tract infection (URI) is a nonspecific term used to describe acute infections involving the nose, paranasal sinuses, pharynx, and larynx above the vocal cords. The aim of this study was to provide a summary of the most common pathogens of URI and to compare advantages and disadvantages of traditional and new rapid microbiological tests used to identify them. Blood samples were simultaneously examined by the enzyme-linked immunosorbent assay (ELISA) and by the FilmArray Respiratory Panel for eight different pathogens in a total of 15 tests performed in nasopharyngeal swabs...
March 3, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28243588/computational-modeling-of-fluid-structure-acoustics-interaction-during-voice-production
#15
Weili Jiang, Xudong Zheng, Qian Xue
The paper presented a three-dimensional, first-principle based fluid-structure-acoustics interaction computer model of voice production, which employed a more realistic human laryngeal and vocal tract geometries. Self-sustained vibrations, important convergent-divergent vibration pattern of the vocal folds, and entrainment of the two dominant vibratory modes were captured. Voice quality-associated parameters including the frequency, open quotient, skewness quotient, and flow rate of the glottal flow waveform were found to be well within the normal physiological ranges...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28228242/effect-of-vitamin-d-deficiency-on-the-laryngo-pharyngeal-tract
#16
Abdul-Latif Hamdan, Ghina Fakhri, Ghassan Haddad, Gabriel Dunya, Doja Sarieddine, Bilal Turfe, Georges Tabet, Sami Azar
OBJECTIVE: To investigate the effect of vitamin D deficiency on the laryngopharyngeal tract. STUDY DESIGN: Prospective cohort study. SETTING: Tertiary care center. SUBJECTS AND METHODS: A total of 38 human subjects were prospectively recruited, equally divided into two groups. The Vitamin D deficiency group defined as 25-OH<25ng/dl and the control subjects with normal vitamin D level defined as 25-OH>25ng/dl. The presence and severity of vocal tract symptoms was assessed using the Vocal Tract Discomfort score...
February 13, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28225537/laryngeal-sensitivity-testing-in-youth-with-exercise-inducible-laryngeal-obstruction
#17
Irena Hočevar-Boltežar, Uroš Krivec, Maja Šereg-Bahar
Exercise-inducible laryngeal obstruction (EILO) has been recognized as a not rare respiratory problem in youth practicing sports. The aim of the study was to test the mechanosensitivity of the larynx, and to identify the factors affecting it in a group of youth with proven EILO. Laryngeal sensory testing was performed in 54 adolescents and young adults with EILO. Laryngeal mucosal alterations were assessed according to the Reflux Finding Score (RFS). The data concerning diseases possibly affecting the upper airway, findings of previously performed flexible videolaryngoscopy during exercise, and RFS score were compared between the participants with laryngeal hyposensitivity and those with normal sensitivity...
February 20, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28222332/acquisition-of-vowel-articulation-in-childhood-investigated-by-acoustic-to-articulatory-inversion
#18
Hiroki Oohashi, Hama Watanabe, Gentaro Taga
While the acoustical features of speech sounds in children have been extensively studied, limited information is available as to their articulation during speech production. Instead of directly measuring articulatory movements, this study used an acoustic-to-articulatory inversion model with scalable vocal tract size to estimate developmental changes in articulatory state during vowel production. Using a pseudo-inverse Jacobian matrix of a model mapping seven articulatory parameters to acoustic ones, the formant frequencies of each vowel produced by three Japanese children over time at ages between 6 and 60 months were transformed into articulatory parameters...
February 18, 2017: Infant Behavior & Development
https://www.readbyqxmd.com/read/28219323/a-preliminary-assessment-of-the-lma-protector%C3%A2-in-non-paralysed-patients
#19
Ban Leong Sng, Farida Binte Ithnin, Deepak Mathur, Eileen Lew, Nian-Lin Reena Han, Alex Tiong-Heng Sia
BACKGROUND: The LMA Protector™ is the latest CE marked single use supraglottic airway device. This airway device provides access and functional separation of the respiratory and digestive tracts. There are two ports (male, female ports) to provide suction in the laryngeal region and insertion of the gastric tube. The aim of our study is to assess the ease of use, airway quality, device positioning, airway leak and complications associated with initial clinical experience in LMA Protector™ usage...
February 20, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28214051/effects-of-a-straw-phonation-protocol-on-acoustic-measures-of-an-satb-chorus-singing-two-contrasting-renaissance-works
#20
Jeremy N Manternach, Chad Clark, James F Daugherty
BACKGROUND: Researchers have found that semi-occluded vocal tract (SOVT) exercises may increase vocal economy by reducing phonation threshold pressure and effort while increasing or maintaining consistent acoustic output. This research has focused solely on individual singers. Much singing instruction, however, takes place in choral settings. Choral singers may use different resonance strategies or unconsciously adjust their singing based on the ability to hear their own sound in relation to others...
February 14, 2017: Journal of Voice: Official Journal of the Voice Foundation
keyword
keyword
104033
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"