نتایج جستجو برای: maximum phonation time
تعداد نتایج: 2110234 فیلتر نتایج به سال:
Autologous fat augmentation of the vocal folds has become widely adopted as a means of vocal rehabilitation in patients with deficient glottal closure. In general, the injection method using autologous tissues has no problems regarding safety issues such as infection of unknown cause, but the period of continuous effect is not constant because absorption may occur after injection. In 99 cases d...
Introduction: "Joubert syndrome" was first introduced in1969. This syndrome is a rare genetic disease with autosomal dominantpattern. Hypotonia, ataxia and motor delay of the disease known as clinical manifestations. In the few reports of this syndrome, mostly functional and structural components studied and radiographic images such as speech and language developmental delay symptoms has been l...
abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...
Acoustic data has long been harvested in fundamental voice investigations since it is easily obtained using a microphone. However, acoustic signals alone do not reveal much about the complex interplay between sound waves, structural surface waves, mechanical vibrations, and fluid flow involved in phonation. Available high speed imaging techniques have over the past ten years provided a wealth o...
OBJECTIVES To evaluate the effect of a self-controlled vocal exercise in elderly people with glottal closure insufficiency. DESIGN Parallel-arm, individual randomized controlled trial. METHODS Patients who visited one of 10 medical centers under the National Hospital Organization group in Japan for the first time, aged 60 years or older, complaining of aspiration or hoarseness, and endoscop...
A new method for phonation detection is presented. The method utilises two microphones attached near the subject's ears. Simplified, phonation is assumed to occur when the signals appear mainly in-phase and at equal amplitude. Several signal processing steps are added in order to improve the phonation detection, and finally the original signal is sorted in separate channels corresponding to the...
Unilateral laryngeal paralysis leads to tension imbalance and hence to asynchronous movements between the two vocal folds during phonation. In the current study, a computational model of phonation that couples a two-mass model of the vocal folds with a Navier-Stokes model of the glottal airflow, has been used to examine the dynamics of vocal fold configurations with tension imbalance and its im...
OBJECTIVE To evaluate the role of partial laryngectomy to treat glottic cancer after failure of radiation therapy. DESIGN A 12-year retrospective outcome analysis. SETTING University referral center. PATIENTS A total of 19 patients who underwent partial laryngectomy to treat glottic cancer after failure of radiation therapy. RESULTS The follow-up period in this group ranged from 31 to 1...
OBJECTIVES Most cases of irresolvable hoarseness are due to deficiencies in the pliability and volume of the superficial lamina propria of the phonatory mucosa. By using a US Food and Drug Administration-approved polymer, polyethylene glycol (PEG), we created a novel hydrogel (PEG30) and investigated its effects on multiple vocal fold structural and functional parameters. METHODS We injected ...
The contribution aims to provide material that can be used in development of more realistic physical as well as theoretical models of voice production. The experimental set-up, methodology and the results of measurement of airflow rate, subglottal, oral and generated acoustic air pressures are presented together with the simultaneously measured flow-induced vibrations of a vocal folds replica, ...
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