OBJECTIVE To assess the usefulness of acoustic analysis with vocal loading test for evaluating the treatment outcomes in occupational voice disorders. METHODS Fifty-one female teachers with dysphonia were examined (Voice Handicap Index--VHI, laryngovideostroboscopy and acoustic analysis with vocal loading) before and after treatment. The outcomes of teachers receiving vocal training (group I)...

transportation vehicles has motivated research in low frequency, structural-acoustic analysis. The internal sound field in the enclosed cavity is significantly affected by the acoustic modal characteristics of the cavity, by the dynamic behavior of the surrounding structure, and by the nature of the coupling of these two dynamic systems. The present work is intended to cast more light on the ac...

the aim of this research was to investigate the ability of arousal control in male and female athletes using mental imagery and biofeedback methods. participants were 30 male and female athlete students of tehran university (mean aged 23) who were assigned into two homogeneous groups based on vividness of movement imagery questionnaire 2. participants were given acoustic biofeedback during thre...

In this study, we use numerical methods to study the acoustic streaming effect of black hole (ABH). Firstly, build an ABH model effect. By deriving waves equations and solving Navier–Stokes equations, obtain flow field, sound temperature field under excitation. Secondly, simulation result reveals mechanism effects on transmission characteristics cavity ABH. The results show that abrupt decrease...

In a weakly coupled structural-acoustic problem, the boundary conditions may be composed by two conditions. One is a velocity boundary condition, which can be obtained from a dynamic structural analysis and the other is an acoustic impedance boundary condition. The acoustic impedance boundary condition is used for modeling acoustic absorbent behavior at boundaries proportional to the velocity d...

In this paper, we calculate the capacity of a point-to-point communication link in an underwater acoustic channel. The analysis takes into account the effects of various acoustic propagation loss models. A physical model of ambient noise power spectral density is also considered. We perform a comparative assessment of the influence of various acoustic transmission loss models on the acoustic ba...

one of the nondestructive methods for assessing the internal quality of some fruits is the processing and analyzing the sound signals generated by an impact on the fruit. in this regard determining the location and the suitable impact levels for a certain fruit is required. in this study, the selected crimson sweet variety of watermelon was used for the acoustic tests by imposing the impact for...