Read by QxMD icon Read

acoustic analysis

Sheng-Fang Bao, Yu-Qi Zhang, Li-Jun Chen, Yu-Min Zhong, Qian Wang, Zhi-Fang Zhang
BACKGROUND: Challenges remain in quantitative evaluation of right ventricular (RV) function by echocardiography. Multiple-view assessment is believed to provide a more comprehensive quantification of RV function than conventional single-view analysis. Peak systolic longitudinal RV strain (RVLS) measured by speckle tracking echocardiography (STE) has clinical and prognostic value. No study has investigated RV systolic function in the repaired tetralogy of Fallot (rTOF) using a standardized four-view iRotate model from one apical view...
December 4, 2018: Echocardiography
Ingo R Titze, Tobias Riede, Anil Palaparthi, Linda S Hynan, Amy Hamilton, Laura Toles, Ted Mau
Purpose: The purposes of this study are to introduce the concept of vocal priorities based on acoustic correlates, to develop an instrument to determine these vocal priorities, and to analyze the pattern of vocal priorities in patients with voice disorders. Method: Questions probing the importance of 5 vocal attributes (vocal clarity, loudness, mean speaking pitch, pitch range, vocal endurance) were generated from consensus conference involving speech-language pathologists, laryngologists, and voice scientists, as well as patient feedback...
December 4, 2018: Journal of Speech, Language, and Hearing Research: JSLHR
Mariška A Bolyanatz
BACKGROUND/AIMS: In Chilean Spanish, syllable- and word-final /s/ are frequently weakened to an [h]-like segment or completely deleted. In word-final position, /s/ serves as the plural morpheme, so its deletion renders a site for potential neutralization with singular items. Chilean scholars have previously described differences in the vowel preceding weakened or deleted /s/ distinguishing it from non-/s/-final words, but this putative incomplete neutralization has not yet been acoustically verified, nor have its conditioning factors been explored...
December 4, 2018: Phonetica
Konstantinos Valsamidis, Konstantinos Titelis, Petros Karkos, Konstantinos Markou, Jiannis Constantinidis, Stefanos Triaridis
PURPOSE: Although septoplasty is considered to be the definitive treatment of septal deviation and is associated with an increase of nasal patency, patients are not always satisfied with the surgical outcome as assessed by its effect on their general Quality of Life (QOL).The aim of this study was to identify the predictive factors that influence the patients' QOL after surgery. METHODS: 60 patients with nasal obstruction and septal deviation were enrolled in this prospective study, and they all completed the follow-up survey of 6 postoperative months...
December 3, 2018: European Archives of Oto-rhino-laryngology
Katarzyna Pawlak-Osińska, Henryk Kaźmierczak, Maria Marzec, Daria Kupczyk, Rafał Bilski, Emilia Mikołajewska, Dariusz Mikołajewski, Beata Augustyńska
Background: Tinnitus is defined as a phantom auditory perception, i.e., sound experience despite the lack of acoustic stimuli in the environment. The aim of this study was to assess the state of the natural antioxidant barrier of a body in patients complaining about the presence of tinnitus. Material and Methods: The study included a total of 51 patients aged from 20 to 62 years with diagnosed idiopathic tinnitus and 19 healthy subjects as a control group. All patients underwent the audiometric tone test, speech audiometry, distortion otoacoustic emission product testing, study of evoked auditory potentials of short latency, and biochemical analysis of venous blood concerning values of activity or concentration of glutathione, glutathione peroxidase, S-transferase, glutathione reductase superoxide dismutase, malondialdehyde, and ceruloplasmin as the selected parameters of oxidative stress...
2018: Oxidative Medicine and Cellular Longevity
Yvonne Höller, Aljoscha Thomschewski, Andreas Uhl, Arne C Bathke, Raffaele Nardone, Stefan Leis, Eugen Trinka, Peter Höller
Brain computer interfaces (BCIs) are thought to revolutionize rehabilitation after SCI, e.g., by controlling neuroprostheses, exoskeletons, functional electrical stimulation, or a combination of these components. However, most BCI research was performed in healthy volunteers and it is unknown whether these results can be translated to patients with spinal cord injury because of neuroplasticity. We sought to examine whether high-density EEG (HD-EEG) could improve the performance of motor-imagery classification in patients with SCI...
2018: Frontiers in Neurology
Christian Brodbeck, L Elliot Hong, Jonathan Z Simon
During speech perception, a central task of the auditory cortex is to analyze complex acoustic patterns to allow detection of the words that encode a linguistic message [1]. It is generally thought that this process includes at least one intermediate, phonetic, level of representations [2-6], localized bilaterally in the superior temporal lobe [7-9]. Phonetic representations reflect a transition from acoustic to linguistic information, classifying acoustic patterns into linguistically meaningful units, which can serve as input to mechanisms that access abstract word representations [10, 11]...
November 21, 2018: Current Biology: CB
Teresa L D Hardy, Jana M Rieger, Kristopher Wells, Carol A Boliek
PURPOSE: This study aimed to identify the most salient set of acoustic predictors of (1) gender attribution; (2) perceived masculinity-femininity; and (3) perceived vocal naturalness amongst a group of transgender and cisgender speakers to inform voice and communication feminization training programs. This study used a unique set of acoustic variables and included a third, androgynous, choice for gender attribution ratings. METHOD: Data were collected across two phases and involved two separate groups of participants: communicators and raters...
November 28, 2018: Journal of Voice: Official Journal of the Voice Foundation
Guijie Liu, Shirui Wang, Yingchun Xie, Xiaojie Tian, Dingxin Leng, Reza Malekain, Zhixiong Li
This paper aims to detect the structure damage in KT type jacket offshore platforms using acoustic emission analysis. Experimental investigation has been implemented to analyze the transmission characteristics, attenuation law, and source localization of the acoustic emission signals. The range of energy attenuation coefficient α and the signal amplitude attenuation law were obtained from experimental data. Hence, the layout of acoustic emission sensors was optimized based on the energy attenuation to achieve online damage monitoring for KT-jacket platforms...
November 2018: Review of Scientific Instruments
Jonathan H Venezia, Steven M Thurman, Virginia M Richards, Gregory Hickok
Existing data indicate that cortical speech processing is hierarchically organized. Numerous studies have shown that early auditory areas encode fine acoustic details while later areas encode abstracted speech patterns. However, it remains unclear precisely what speech information is encoded across these hierarchical levels. Estimation of speech-driven spectrotemporal receptive fields (STRFs) provides a means to explore cortical speech processing in terms of acoustic or linguistic information associated with characteristic spectrotemporal patterns...
November 27, 2018: NeuroImage
S I Kharlap, T N Safonova, O V Eksarenko, E A Vashkulatova, S E Avetisov
PURPOSE: To analyze the condition of the lacrimal gland in patients confirmed to have sarcoidosis. MATERIAL AND METHODS: The study included 46 patients (92 orbits) with verified diagnosis of systemic sarcoidosis that were examined during the period of 2009 to 2014. The age of patients ranged from 23 to 65 years and the average was 45.1 years. Among the examined patients, 66% were female and 34% male. In all patients, the diagnosis was verified according to modern criteria...
2018: Vestnik Oftalmologii
Wilmarie Marrero-Ortiz, Min Hu, Zhuofei Du, Yuemeng Ji, Yujue Wang, Song Guo, Yun Lin, Mario Gomez-Hermandez, Jianfei Peng, Yixin Li, Jeremiah Secrest, Misti Levy Zamora, Yuan Wang, Taicheng An, Renyi Zhang
Brown Carbon (BrC) aerosols scatter and absorb solar radiation, directly affecting the Earth's radiative budget. However, considerable uncertainty exists concerning the chemical mechanism leading to BrC formation and their optical properties. In this work, BrC particles were prepared from mixtures of small α-dicarbonyls (glyoxal and methylglyoxal) and amines (methylamine, dimethylamine, and trimethylamine). The absorption and scattering of BrC particles were measured using a photo-acoustic extinctometer (405 and 532 nm), and the chemical composition of the α-dicarbonyl-amine mixtures was analyzed using orbitrap-mass spectrometry and thermal desorption-ion drift-chemical ionization mass spectrometry...
November 30, 2018: Environmental Science & Technology
Priscila Del Aguila da Silva, Ricardo Andrés Ramirez Uscategui, Victor José Correia Santos, Augusto Ryonosuke Taira, Renata Sitta Gomes Mariano, Mariana Garcia Kako Rodrigues, Ana Paula Rodrigues Simões, Marjury Cristina Maronezi, Michelle Lopes Avante, Frederico Ozanan Barros Monteiro, Wilter Ricardo Russiano Vicente, Marcus Antonio Rossi Feliciano
The aim of this study was to evaluate the stiffness of fetal lungs, liver, kidneys, and placentomes by acoustic radiation force impulse (ARFI) elastography in ovine and to correlate obtained findings with fetal development. Twenty-four ewes were included and tissue stiffness of fetal lung, liver, kidney, and placentome were measured beginning with 10th gestational week by qualitative-quantitative ARFI elastography. A total of 33 healthy lambs were born. Qualitative elastographic analysis permitted to classify maternal and fetal tissues elasticity in decreasing order as follows: placentome, kidney, liver, and lung...
November 29, 2018: Reproduction in Domestic Animals, Zuchthygiene
Ruochong Zhang, Fei Gao, Xiaohua Feng, Haoran Jin, Shaohua Zhang, Siyu Liu, Yunqi Luo, Bengang Xing, Yuanjin Zheng
A novel "guide star" assisted photoacoustic (GSPA) method for noninvasive glucose measurement has been proposed. Instead of receiving PA signals that are directly generated by tissue, a virtual photodiode is employed to amplify the PA signal difference regarding amplitude and peak arrival time caused by glucose concentration variations in an indirect way. Being different from traditional PA spectroscopy, this method can improve sensitivity and accuracy by optimizing optical path lengths (or tissue thickness)...
November 28, 2018: ACS Sensors
Daniela Beltrami, Gloria Gagliardi, Rema Rossini Favretti, Enrico Ghidoni, Fabio Tamburini, Laura Calzà
Background: The discovery of early, non-invasive biomarkers for the identification of "preclinical" or "pre-symptomatic" Alzheimer's disease and other dementias is a key issue in the field, especially for research purposes, the design of preventive clinical trials, and drafting population-based health care policies. Complex behaviors are natural candidates for this. In particular, recent studies have suggested that speech alterations might be one of the earliest signs of cognitive decline, frequently noticeable years before other cognitive deficits become apparent...
2018: Frontiers in Aging Neuroscience
Kristen M Allison, Katherine C Hustad
Purpose: The objectives of this study were to examine different speech profiles among children with dysarthria secondary to cerebral palsy (CP) and to characterize the effect of different speech profiles on intelligibility. Method: Twenty 5-year-old children with dysarthria secondary to CP and 20 typically developing children were included in this study. Six acoustic and perceptual speech measures were selected to quantify a range of segmental and suprasegmental speech characteristics and were measured from children's sentence productions...
November 27, 2018: Journal of Speech, Language, and Hearing Research: JSLHR
Jia-Wei Li, Yu-Yang Tong, Yi-Zhou Jiang, Xu-Juan Shui, Zhao-Ting Shi, Cai Chang
OBJECTIVES: To identify clinicopathologic and ultrasound (US) variables that were associated with a heavy nodal tumor burden, which was defined as 3 or more lymph nodes involved with metastasis to the axilla after invasive breast carcinoma. METHODS: With ethical approval, 621 patients with a pathologic diagnosis of invasive breast carcinoma were retrospectively analyzed for clinical, pathologic, and US data. Pathologic findings were ascertained by the final paraffin pathologic analysis...
November 27, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Jean Paul Meningaud, Mounia SidAhmed-Mezi, Raphaelle Billon, Kessara Rem, Simone La Padula, Barbara Hersant
BACKGROUND AND OBJECTIVE: Striae distensae (SD) are cutaneous lesions that often occur on the breasts, abdomen, hips, and thighs. The aim of this study is to evaluate the effectiveness of a new technique using a non-invasive Er:YAG laser combined with Spatially Modulated Ablation (SMA) module for the treatment of SD. STUDY DESIGN/MATERIALS AND METHODS: This prospective pilot clinical study included 20 patients with skin phototypes I to IV who are affected by SD...
November 27, 2018: Lasers in Surgery and Medicine
Curtis J Billings, Lauren K Dillard, Zachary B Hoskins, Tina M Penman, Kelly M Reavis
BACKGROUND: Department of Veterans Affairs (VA) audiologists have anecdotally reported examining numerous Veterans with normal pure-tone thresholds; however, the prevalence of these patients within the VA is unknown. The VA audiological data repository provides an ideal dataset to examine this group of Veterans. Knowing the prevalence of normal-hearing Veterans within the VA system is the first step to understanding the underlying referral patterns and clinical complaints of Veterans...
November 2018: Journal of the American Academy of Audiology
Remi A Kessler, Deborah L Benzil, Joshua Loewenstern, Sabrina Chen, Ansh Bhammar, Karan M Kohli, Constantinos G Hadjipanayis, Alan Scarrow, Joshua Bederson, Raj K Shrivastava
INTRODUCTION: Medical malpractice litigation is an issue of major concern in neurosurgery, with 19.1% of neurosurgeons facing a claim annually. Neurosurgery possesses the greatest risk of malpractice of any specialty, likely due to the complex clinical environment and disease severity. In this study, the authors characterize such litigation to determine common factors that compel plaintiffs to file these claims. METHODS: WestLawNext, a prominent legal database, was utilized to identify all cases from 1985-2016 related to brain tumors...
November 23, 2018: World Neurosurgery
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"