results certain correlations were found between fundamental frequency in vowel and total vhi, physical, functional and emotional domains of vhi in group 1 (r = 0.636, 0.649, 0.613 and 0.592 respectively). there was good correlation between speaking fundamental frequency and total vhi and its subscales - except the physical subscale - were also correlated. in group 2, the correlations between ji...

A new adaptive fast multipole boundary element method (BEM) for solving 3-D half-space acoustic wave problems is presented in this paper. The half-space Green’s function is employed explicitly in the boundary integral equation (BIE) formulation so that a tree structure of the boundary elements only for the boundaries of the real domain need to be applied, instead of using a tree structure that ...

Background: Vocal abuse and misuse would result in vocal fold polyp. Certain features define the extent of vocal folds polyp effects on voice acoustic parameters. The present study aimed to define the effects of polyp size on acoustic voice parameters, and compare these parameters in hemorrhagic and non-hemorrhagic polyps.Methods: In the present retrospective study, 28 individuals with hemorrha...

In this work, two fast multipole boundary element formulations for the linear time-harmonic acoustic analysis of finite periodic structures are presented. Finite consist a bounded number unit cell replications in one or more directions periodicity. Such can be designed to efficiently control and manipulate sound waves referred as metamaterials sonic crystals. Our methods subdivide geometry into...

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in this study, an intelligent system for sorting closed shell and open shell pistachio nuts, was designed and developed based on combined acoustic and artificial neural network (ann) techniques. the system included a microphone, pc, material handling equipment and an air reject pneumatic mechanism. the microphone, placed under the steel plate, received sound signals generated by the pistachio n...

background acoustic trauma is an injury to the hearing mechanisms in the inner ear due to excessive noise. this injury is the most prevalent cause of sensorineural hearing loss in humans, especially from occupational exposure. previous studies have shown the essential role of free radical formation in the inner ear hearing loss caused by acoustic trauma. objectives this study was performed to d...

Predicting and mitigating the impact of anthropogenic barriers on migratory fish requires an understanding individual environmental factors that influence barrier passage. Here, upstream spawning migrations iteroparous twaite shad Alosa fallax were investigated over three successive in a highly fragmented river basin using passive acoustic telemetry ( n = 184). More approached passed lower reac...