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Stephen Jannetts, Felix Schaeffler, Janet Beck, Steve Cowen
BACKGROUND: Occupational voice problems constitute a serious public health issue with substantial financial and human consequences for society. Modern mobile technologies such as smartphones have the potential to enhance approaches to prevention and management of voice problems. This paper addresses an important aspect of smartphone-assisted voice care: the reliability of smartphone-based acoustic analysis for voice health state monitoring. AIM: To assess the reliability of acoustic parameter extraction for a range of commonly used smartphones by comparison with studio recording equipment...
February 19, 2019: International Journal of Language & Communication Disorders
Ruoyu Liao, Haochen Tian, Tianli Feng, Youjian Song, Minglie Hu, Günter Steinmeyer
The f-to-2f interferometer plays a key role for carrier-envelope phase (CEP) measurement and subsequent stabilization. The CEP measurement typically relies on the application of two optical nonlinearities, namely supercontinuum generation and second-harmonic generation. Then the cascadation of these nonlinearities often leads to signal levels on the order of a few photons per pulse. We experimentally demonstrate that the introduction of optical gain into the infrared arm of an f-to-2f interferometer can mitigate this detection bottleneck and improve signal-to-noise ratios by 20 dB compared to purely passive schemes...
February 15, 2019: Optics Letters
Batoul Jaber, Reina Remman, Nayla Matar
INTRODUCTION: A patient's voice can vary from one moment to another, and these variations cannot be captured by a one-time assessment. Multiple assessments may give a more holistic idea of the severity of the patient's dysphonia and by asking the patient to do the recordings he becomes involved in his therapeutic plan from the beginning. AIM: This study aims to evaluate the added value of a repetitive assessment outside the speech therapist's (SLP) clinic, to have a broader vision of the voice disorder and identify parameters that change after working hours to be able to explain this disorder and find solutions for it...
February 11, 2019: Journal of Voice: Official Journal of the Voice Foundation
Joanna Jackowska, Waldemar Wojnowski, Anna Hashimoto, Bogna Małaczyńska, Krzysztof Piersiala, Piotr Świdziński, Bożena Wiskirska-Woźnica, Małgorzata Wierzbicka
Mechanical debulking of laryngeal papillomas is associated with voice disorders due to impairment of the vocal fold's mucosa. Intraepithelial injection of cidofovir reduces damage to the laryngeal structures and thus improves vocal parameters. The aim of our study was to compare vocal quality before and after cidofovir and CO2 laser treatment by means of objective phoniatric parameters and to obtain evidence concerning voice outcomes. The vocal parameters of 42 patients with RRP were assessed before and after intralesional cidofovir and CO2 laser debulking treatment (Lumenis AcuPulse 40 CO2 laser, wavelength 10...
February 14, 2019: Lasers in Medical Science
Stefan Meinecke, Lukas Drzewietzki, Christoph Weber, Benjamin Lingnau, Stefan Breuer, Kathy Lüdge
We experimentally and theoretically investigate the pulsed emission dynamics of a three section tapered semiconductor quantum dot laser. The laser output is characterized in terms of peak power, pulse width, timing jitter and amplitude stability and a range of outstanding pulse performance is found. A cascade of dynamic operating regimes is identified and comprehensively investigated. We propose a microscopically motivated traveling-wave model, which optimizes the computation time and naturally allows insights into the internal carrier dynamics...
February 11, 2019: Scientific Reports
Emre Apaydın, Aykut İkincioğulları, Mustafa Çolak, Doğan Atan, Serdar Ensari, Hacı Hüseyin Dere
OBJECTIVE: To demonstrate the surgical efficacy of septoplasty using acoustic rhinometry (AR) and anterior rhinomanometry (ARM) and to evaluate the effect of septoplasty on voice performance through subjective voice analysis methods. MATERIALS AND METHODS: This prospective study enrolled a total of 62 patients who underwent septoplasty with the diagnosis of deviated nasal septum. Thirteen patients with no postoperative improvement versus preoperative period as shown by AR and/or ARM tests and three patients with postoperative complications and four patients who were lost to follow-up were excluded...
February 6, 2019: Journal of Voice: Official Journal of the Voice Foundation
Mehdi Mobli, Tomas M Miljenović
The grouping of data in bursts, also referred to as clusters, spikes or clumps, is a common phenomenon in stochastic sampling. There have been several reports that suggest that in NMR, the presence of such bursts is beneficial to spectral reconstruction where data are sampled nonuniformly. In this work, we seek to define a mode of sampling that produces bursts of randomly distributed data in a controlled manner. An algorithm is described for achieving this where the burst length and its uniformity is controlled - we refer to this type of sampling mode as clustered sampling...
January 26, 2019: Journal of Magnetic Resonance
Ronan Gourgues, Iman Esmaeil Zadeh, Ali W Elshaari, Gabriele Bulgarini, Johannes W N Los, Julien Zichi, Dan Dalacu, Philip J Poole, Sander N Dorenbos, Val Zwiller
Integration of superconducting nanowire single-photon detectors and quantum sources with photonic waveguides is crucial for realizing advanced quantum integrated circuits. However, scalability is hindered by stringent requirements on high-performance detectors. Here we overcome the yield limitation by controlled coupling of photonic channels to pre-selected detectors based on measuring critical current, timing resolution, and detection efficiency. As a proof of concept of our approach, we demonstrate a hybrid on-chip full-transceiver consisting of a deterministically integrated detector coupled to a selected nanowire quantum dot through a filtering circuit made of a silicon nitride waveguide and a ring resonator filter, delivering 100 dB suppression of the excitation laser...
February 4, 2019: Optics Express
Hidetomo Sakaino
Videos are spatio-temporally rich in static to dynamic objects/scenes, sparse to dense, and periodic to non-periodic motions. Particularly, dynamic texture (DT) exhibits complex appearance and motion changes that remain challenge to deal with. This paper presents an energy optimization method for feature extraction and recognition in videos. For noise and background jitter, Tikhonov regularization (TR) with eigen-vector and Frenet-Serret formula based energy constraints is also proposed. Different periodicity of DT can be adapted by the time-varying number of learning temporal frames...
January 31, 2019: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
Mikhail Kissine, Philippine Geelhand
Subjective impressions of speech delivery in Autism Spectrum Disorder (ASD) as monotonic or over-precise are widespread but still lack robust acoustic evidence. This study provides a detailed acoustic characterization of the specificities of speech in individuals with ASD using an extensive sample of speech data, from the production of narratives and from spontaneous conversation. Syllable-level analyses (30,843 tokens in total) were performed on audio recordings from two sub-tasks of the Autism Diagnostic Observation Schedule from 20 adults with ASD and 20 pairwise matched neuro-typical adults, providing acoustic measures of fundamental frequency, jitter, shimmer and the first three formants...
February 1, 2019: Journal of Autism and Developmental Disorders
Eric Barnhill, Mila Nikolova, Cemre Ariyurek, Florian Dittmann, Jurgen Braun, Ingolf Sack
MRI phase contrast imaging methods that assemble slice-wise acquisitions into volumes can contain interslice phase discontinuities (IPDs) over the course of the scan from sources including unavoidable physiological activity. In magnetic resonance elastography (MRE) this can alter wavelength and tissue stiffness estimates, invalidating the analysis. We first model this behavior as jitter along the z-axis of the phase of 3D complex-valued wave volumes. A two-step image processing pipeline is then proposed that removes IPDs...
January 25, 2019: IEEE Transactions on Medical Imaging
Haiqiu Liu, Huimin Ma, Zhaohui Jiang, Dejie Yan
Parallax observations from staggered charge-coupled devices (CCDs) have been applied to satellite jitter detection. Nevertheless, the jitter during the initial period of an imaging process cannot be detected. This paper presents an approach that combines parallax observations with the attitude data from attitude-measuring sensors in order to detect the global jitter, including the initial jitter. Low-frequency components, which can be reconstructed from attitude data, account for most jitter energy, and determine the jitter curve's overall shape...
January 21, 2019: Optics Express
Andrea Lovato, Maria Rosaria Barillari, Luciano Giacomelli, Lisa Gamberini, Cosimo de Filippis
OBJECTIVES: The aim of this study was to investigate if any clinical and phoniatric characteristics or quality-of-life measures could predict the outcome of unilateral vocal fold paralysis (UVFP) initially managed with speech therapy. METHODS: Forty-six patients with UVFP were evaluated using laryngostroboscopy, the GIRBAS (grade, instability, roughness, breathiness, asthenia, and strain) scale, acoustic analysis, and the Voice Handicap Index-10 (VHI-10) questionnaire...
January 29, 2019: Annals of Otology, Rhinology, and Laryngology
Young Min Park, Jae-Yol Lim, Min Seok Kang, Hong-Shik Choi
OBJECTIVE: We have been performing glottoplasty using angiolytic laser, including pulsed dye laser (PDL) or potassium titanyl phosphate (KTP) laser, for the treatment of sulcus vocalis. In this study, we retrospectively reviewed the treatment results of sulcus vocalis patients who had undergone glottoplasty using angiolytic laser and evaluated the efficacy and safety of this surgical technique. METHODS: From January 2008 to April 2016, 79 patients with sulcus vocalis who underwent angiolytic LASER-assisted glottoplasty were enrolled in the study...
January 29, 2019: Annals of Otology, Rhinology, and Laryngology
Kun Huang, Jing Zeng, Jiwei Gan, Qiang Hao, Ming Yan, Heping Zeng
We have proposed and implemented for the first time to our knowledge a passive and all-optical pulse synchronization for polarization-maintaining fiber lasers. Specifically, the synchronization system was comprised of two independent Yb-doped and Er-doped mode-locked fiber lasers in a master-slave configuration. Master pulses were injected into the slave laser cavity consisting of a nonlinear amplifying loop mirror, which provided an effective fast intensity modulator due to the periodic introduction of nonreciprocal phase difference...
November 26, 2018: Optics Express
Nora Gaspar, Ronny Eichler, Eran Stark
BACKGROUND: Modern electrophysiological experiments are moving towards closing the loop, where the extrinsic (behavioral) and intrinsic (neuronal) variables automatically affect stimulation parameters. Rodent experiments targeting spatial behavior require animal 2D kinematics to be continuously monitored in a reliable and accurate manner. Cameras provide a robust, flexible, and simple way to track kinematics on the fly. Indeed, several available camera-based systems yield high spatiotemporal resolution...
January 13, 2019: Journal of Neuroscience Methods
Angélique Remacle, Ysaline Genel, Magali Segers, Marc de Bodt
PURPOSE: Previous research proposed normative data on gender- and age-specific voice acoustics for adults. Such reference values are lacking for children, particularly under the age of 6. This study was intended (1) to collect reliable normative data for the acoustic parameters of 5-year-old children's voices, and (2) to investigate potential gender-specific differences. STUDY: Prospective and cross-sectional. METHODS: Acoustic analyses were done on the voices of 53 normophonic children (26 girls; 27 boys) aged 5;0-5;11 years, using Praat software...
January 16, 2019: Logopedics, Phoniatrics, Vocology
Jianwei Xue, Aimin Jiang, Sen Wang, Jingyu Wang, Yanfeng Dai, Zhichao Dong
To increase the spatial resolution while circumventing the problems of increased mass and volume of monolithic telescopes, a Fizeau imaging interferometer testbed (FIIT) with three individual subtelescopes was designed and constructed for high resolution astronomical observation. FIIT is intended to be mounted on a distributed small-satellite constellation with a formation fly configuration; thus the extremely stable pointing of the subtelescopes is the prerequisite for phased imaging, which is because the satellite suffers from some extent of detrimental jitters and drifts needs to be corrected by FIIT itself...
December 1, 2018: Applied Optics
Sierra Pugh, Matthew J Heaton, Brian Hartman, Candace Berrett, Chantel Sloan, Amber M Evans, Tebeb Gebretsadik, Pingsheng Wu, Tina V Hartert, Rees L Lee
RSV bronchiolitis (an acute lower respiratory tract viral infection in infants) is the most common cause of infant hospitalizations in the United States (US). The only preventive intervention currently available is monthly injections of immunoprophylaxis. However, this treatment is expensive and needs to be administered simultaneously with seasonal bronchiolitis cycles in order to be effective. To increase our understanding of bronchiolitis timing, this research focuses on identifying seasonal bronchiolitis cycles (start times, peaks, and declinations) throughout the continental US using data on infant bronchiolitis cases from the US Military Health System Data Repository...
January 13, 2019: Statistics in Medicine
Jing Kang, Austin Scholp, Jacob Tangney, Jack J Jiang
PURPOSE: This study investigated the effects of straw phonation therapy on the aerodynamic and acoustic parameters of the vocal folds at different levels of elongation and subglottal pressure. METHODS: 20 excised canine larynges were used in both experimental (straw phonation therapy simulation) and control conditions. Aerodynamic parameters, including phonation threshold pressure (PTP), phonation instability pressure (PIP), phonation pressure range (PPR), phonation threshold flow (PTF), phonation instability flow (PIF), phonation flow range (PFR), were obtained at different levels of vocal fold elongation (0%, 10%, 20%)...
January 10, 2019: European Archives of Oto-rhino-laryngology
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