Many common voice disorders are chronic or recurring conditions that likely to result from faulty and/or abusive patterns of vocal behavior, referred generically as hyperfunction. An ongoing goal in clinical assessment is the development and use noninvasively derived measures quantify track daily status hyperfunction so diagnosis treatment such behaviorally based can be improved. This paper reports on a new, versatile, cost-effective tool for mobile monitoring acquires high-bandwidth signal...

Many common voice disorders are chronic or recurring conditions that likely to result from inefficient and/or abusive patterns of vocal behavior, referred as hyperfunction. The clinical management hyperfunctional would be greatly enhanced by the ability monitor and quantify detrimental behaviors during an individual's activities daily life. This paper provides update on ongoing work uses a miniature accelerometer neck surface below larynx collect large set ambulatory data patients with...

The purpose of this study was to determine the validity preliminary reports showing that glottal aerodynamic measures can identify pathophysiological phonatory mechanisms for phonotraumatic and nonphonotraumatic vocal hyperfunction, which are each distinctly different from normal function.Glottal (estimates subglottal air pressure, peak-to-peak airflow, maximum flow declination rate, open quotient) were obtained noninvasively using a pneumotachograph mask with an intraoral pressure catheter...

Despite the frequent observation of a persistent opening in posterior cartilaginous glottis normal and pathological phonation, its influence on self-sustained oscillations vocal folds is not well understood. The effects gap fold tissue dynamics resulting acoustics were numerically investigated using specially designed flow solver reduced-order model human phonation. inclusion areas 0.03–0.1 cm2 reduced energy transfer from fluid to by more than 42%–80% radiated sound pressure level 6–14 dB,...

Three-way interactions between sound waves in the subglottal and supraglottal tracts, vibrations of vocal folds, laryngeal flow were investigated. Sound wave propagation was modeled using a reflection analog method. An effective single-degree-of-freedom model designed to vocal-fold vibrations. The effects orifice geometry changes on considered by enforcing time-varying discharge coefficient within Bernoulli model. resulting allowed for energy transfer from structural vibrations, an essential...

Different source-related factors can lead to vocal fold instabilities and bifurcations referred as voice breaks. Nonlinear coupling in phonation suggests that changes acoustic loading also be responsible for this unstable behavior. However, no vivo visualization of tissue motion during these acoustically induced has been reported. Simultaneous recordings laryngeal high-speed videoendoscopy, acoustics, aerodynamics, electroglottography, neck skin acceleration are obtained from a participant...

Voice disorders are medical conditions that often result from vocal abuse/misuse which is referred to generically as hyperfunction. Standard voice assessment approaches cannot accurately determine the actual nature, prevalence, and pathological impact of hyperfunctional behaviors because such can vary greatly across course an individual's typical day may not be clearly demonstrated during a brief clinical encounter. Thus, it would clinically valuable develop noninvasive ambulatory measures...

There has been consistent interest among speech signal processing researchers in the accurate estimation of fundamental frequency (F0) signals. This study examines ten F0 algorithms (some well-established and some proposed more recently) to determine which these is, on average, better able estimate sustained vowel /a/. Moreover, a robust method for adaptively weighting estimates individual based quality performance measures is proposed, using an adaptive Kalman filter (KF) framework. The...

A model-based inverse filtering scheme is proposed for an accurate, non-invasive estimation of the aerodynamic source voiced sounds at glottis. The approach, referred to as subglottal impedance-based (IBIF), takes input signal from a lightweight accelerometer placed on skin over extrathoracic trachea and yields estimates glottal airflow its time derivative, offering important advantages traditional methods that deal with supraglottal vocal tract. based mechano-acoustic impedance...

Purpose The purpose of this viewpoint article is to facilitate research on vocal hyperfunction (VH). VH implicated in the most commonly occurring types voice disorders, but there remains a pressing need increase our understanding etiological and pathophysiological mechanisms associated with improve prevention, diagnosis, treatment VH-related disorders. Method A comprehensive theoretical framework for proposed based an integration prevailing clinical views evidence. Results fundamental...

Assessing the health status of vegetation is vital importance for all stakeholders. Multi-spectral and hyper-spectral imaging systems are tools evaluating in laboratory settings, also hold potential assessing large portions land. However, literature lacks benchmark datasets to test algorithms predicting plant status, with most researchers creating tailored datasets. This work presents a dataset composed multi-spectral images, reflectance values, measurements weight, chlorophyll, nitrogen...

Purpose: This study uses a voice production model to estimate muscle activation levels and subglottal pressure (P S ) in patients with phonotraumatic vocal hyperfunction (PVH), based on ambulatory measurements of sound level (SPL) spectral tilt (H 1 –H 2 ). In addition, variations these physiological parameters are evaluated respect different values the Daily Phonotrauma Index (DPI). Method: The obtained data from diagnosed PVH matched control group. To infer parameters, were mapped onto...

Vocal fold vibratory asymmetry is often associated with inefficient sound production through its impact on source spectral tilt. This association investigated in both a computational voice model and group of 47 human subjects. The provides indirect control over the degree left–right phase within nonlinear source–filter framework, high-speed videoendoscopy vivo measures vocal asymmetry. Source tilt are estimated from inverse-filtered spectrum simulated recorded radiated acoustic pressure. As...

Purpose Our goal was to test prevailing assumptions about the underlying biomechanical and aeroacoustic mechanisms associated with phonotraumatic lesions of vocal folds using a numerical lumped-element model voice production. Method A triangular glottis, posterior glottal opening, arytenoid posturing is proposed. Normal altered by introducing various prephonatory configurations. Potential compensatory (increased subglottal pressure, muscle activation, supraglottal constriction) are adjusted...

Phonotraumatic vocal hyperfunction (PVH) is associated with chronic misuse and/or abuse of voice that can result in lesions such as fold nodules. The clinical aerodynamic assessment function has been recently shown to differentiate between patients PVH and healthy controls provide meaningful insight into pathophysiological mechanisms these disorders. However, all current incomplete because its inability objectively identify the type extent detrimental phonatory during daily use. study sought...

Miniature high-bandwidth accelerometers on the anterior neck surface are used in laboratory and ambulatory settings to obtain vocal function measures. This study compared widely applied L1-L2 measure (historically, H1-H2)-the difference between log-magnitude of first second harmonics-computed from glottal airflow waveform with derived raw neck-surface acceleration signal 79 vocally healthy female speakers. Results showed a significant correlation (r = 0.72) values estimated both...

Removal of artifacts induced by muscle activity is crucial for analysis the electroencephalogram (EEG), and continues to be a challenge in experiments where subject may speak, change facial expressions, or move. Ensemble empirical mode decomposition with canonical correlation (EEMD-CCA) has been proven an efficient method denoising EEG contaminated artifacts. EEMD-CCA, likewise majority algorithms, does not incorporate any statistical information artifact, namely, electromyogram (EMG)...

Measurements of body sounds on the skin surface have been widely used in medical field and continue to be a topic current research, ranging from diagnosis respiratory cardiovascular diseases monitoring voice dosimetry. These measurements are typically made using light-weight accelerometers and/or air-coupled microphones attached skin. Although normally neglected, air-borne generated by subject or other sources background noise can easily corrupt such recordings, which is particularly...

Excessive vocal fold collision pressures during phonation are considered to play a primary role in the formation of benign lesions, such as nodules. The ability accurately and reliably acquire intraglottal pressure has potential provide unique insights into pathophysiology phonotrauma. Difficulties arise, however, directly measuring contact due physical intrusion from sensor that may disrupt mechanics, well difficulty determining probe/sensor position relative location. These issues...

Poor laryngeal muscle coordination that results in abnormal glottal posturing is believed to be a primary etiologic factor common voice disorders such as non-phonotraumatic vocal hyperfunction. Abnormal activity of antagonistic muscles hypothesized play key role the alteration normal fold biomechanics dysphonia associated with disorders. Current low-order models folds are unsatisfactory test this hypothesis since they do not capture co-contraction antagonist pairs. To address limitation,...

Many voice disorders are the result of intricate neural and/or biomechanical impairments that poorly understood. The limited knowledge their etiological and pathophysiological mechanisms hampers effective clinical management. Behavioral studies have been used concurrently with computational models to better understand typical pathological laryngeal motor control. Thus far, however, a unified framework quantitatively integrates physiologically relevant phonation control speech has not...

End-to-end deep learning models have shown promising results for the automatic screening of Parkinson's disease by voice and speech. However, these often suffer degradation in their performance when applied to scenarios involving multiple corpora. In addition, they also show corpus-dependent clusterings. These facts indicate a lack generalisation or presence certain shortcuts decision, suggest need developing new corpus-independent models. this respect, work explores use domain adversarial...

A theoretical flow solution is presented for predicting the pressure distribution along vocal fold walls arising from asymmetric that forms during closing phases of speech. The resultant wall jet was analyzed using boundary layer methods in a non-inertial reference frame attached to moving wall. near-wall velocity profiles on developed based Falkner-Skan similarity and it demonstrated imposed by inviscid core jet. method validated with experimental data 7.5 times life-size models, acquired...