Background and Aim: Functional voiding disorders (FVDs) are common problems in children. The effect of VIBROACOUSTIC therapy has not been examined in children with FVDs. The aim of this study was to investigate the efficacy of VIBROACOUSTIC therapy for treatment of FVDs in children. Methods: Seventy-eight children were included in this prospective study. Dysfunctional voiding score (DVS) and nocturnal enuresis (NE) score were measured before and after VIBROACOUSTIC treatment. The success of VIBROACOUSTIC therapy use was evaluated according to the percentage of decrease in DVS and NE scores relative to the pre-treatment values. Descriptive and analytic statistical methods were applied for data analysis using SPSS software version 22. 0. Results: The mean age of the participants was 8. 65±, 3. 11 years, and half of them were boys. Of 78 patients, 60 were school-aged and 18 were preschool-aged children. A significant difference was noticed between DVS score (p < 0. 01) and NE score (p < 0. 01) before and after VIBROACOUSTIC therapy in school-aged children. No significant correlation was observed between the success of VIBROACOUSTIC therapy and factors such as enuresis type (primary/secondary), applied form of pharmacologic therapy, baseline DVS and NE score, and the presence of a positive family history and expressed through percentage of decrease in DVS and NE scores in school-aged children. Conclusion: The results of the present study showed the positive effect of the VIBROACOUSTIC therapy in school-aged children with functional voiding disorders. It is, however, necessary to conduct further prospective studies in order to confirm its effectiveness and determine its long-term results.

Introduction Fetal movement started at the 7th weeks of pregnancy and by the end of pregnancy will gradually be perfect and harmonious. Near-term fetuses can discriminate acoustic features, such as frequencies and spectra, and process complex auditory streams. In this study, we aimed to evaluate fatal movement in response to music and vibration STIMULATION. Materials and Methods This study is a clinical trial that was conducted in two groups and two-steps. Participants were pregnant women (primigravida) who have referring to the Shahid Beheshti Hospital in Isfahan during 2013 to receive routine prenatal care. The 64 pregnant women (32-36 weeks) were randomly assigned to the groups of VIBROACOUSTIC STIMULATION (n= 32) and Music (n=32). They were stimulated immediately after the first non stress test and before the second test. The researchers’ evaluated and analyzed possible changes in non-stress test results using SPSS software version 20.Results Mean age of the subjects in VIBROACOUSTIC group and in music group were (25.5±2.6) (24.9±4.4) respectively. Paired t-test showed there was no relationship between the average number of acceleration of the fetal heart rate before and after the intervention (P>0.05). On the other hand, there was a significant correlation between the average number of fetal movements in the music group before and after the intervention (P<0.05). Conclusion Mothers listen to music has led to increase their perception of fetal movements and increased number of fetal movements. So perhaps the music can use for the evaluation of fetal movement in high-risk mothers or mothers who complain of decreased fetal movements. As a result, the music may be used as a tool for assessment of fetal well-being.

Introduction: Considering the importance of diagnosing fetal distress and knowing diagnostic methods with minimum cost and time and high diagnostic value, this study was performed to evaluate the VIBROACOUSTIC STIMULATION test (VAST) value in predicting fetal distress in women in active phase of labor, reffering to Motazedi hospital, Kermanshah, 2004.Materials and Methods: This clinical trial study was carried out on women in active phase of labor (dilatation >3-4), full term, single fetus, cephalic presentation, without previous diseases and also abnormal fetus. At first FHR was monitored for 15 minutes, then VIBROACOUSTIC STIMULATION was done for 3 seconds using an artificial larynx of Seimens Servox with high - pitch intensity equal to 105 dB. Results were recorded as non reactive and reactive FHR (twice 15 beats acceleration for 15 seconds). Other variables such as type of delivery, 1 and 5 minutes Apgar, meconium passing and nuch cord were documented. Data was analyzed by descriptive statistics and diagnostic value test.Results: Age of women was 25.2±5.8, number of pregnancy 1.94±1.33 and 51.8% of them had one pregnancy. FHR before VAST was 61.1% reactive and 26.3% suspicious and after VAST 60.8% reactive and 5.3% suspicious. In VAST method sensitivity, specillcity and diagnostic value were 88.3%, 70% and 75.5% respectively and in non VAST method 68.3%, 66.5%, 23.6%.Conclusion: This study showed that VAST can assist to reduce suspicious cases of FHR. The prognostic value of VAST in predicting fetal distress was high It is recommended to carry out further researches about duration and intensity of sound and using periodic FHR.

Background: The most frequently used test for evaluation of fetal health is the Non Stress Test (NST). Unfortunately it has a high incidence of false positive results. The combination of VIBROACOUSTIC STIMULATION with the NTS has been shown to reduce non reactive results.Methods: A tests assessment method was chosen with a simple randomized sampling. 40 pregnant women with non reactive NST in the first 20 minutes who received VAS in one of Tehran University's Hospitals were compared with BPP scores. A VIBROACOUSTIC STIMULATION was applied for a 3 seconds on the maternal abdomen and fallowed within 10 minutes. Data collection tools were NST, sonography instruments, NST result paper, tooth brusher, watch, demographic questioner and check list. Data analysis was made by descriptive static and by using the Fisher's Exact Test (with level of significant at p<0/05). All statistical analysis were performed using an spss/win.Results: After VAS, 70% of non reactive tracing became reactive. All cases with fetal reactivity response after a VAS had a subsequent BPP score of 8 (negative predictive value of 100%). False positivity of VAS was lower than NST.Conclusion: VAS offers benefits, by decreasing the incidence of non reactive test and reducing test time. VAS lowers the rate of false positive NST. VAS is safe and allows more efficient of prenatal services. This test could be used as a rapid antepartum test to predict fetal well-being.

Introduction: One of the essential components of the process of prenatal care is the assessment of the fetal health, for which there are several tests. Recently, in some studies, VIBROACOUSTIC STIMULATION and halogen light have also been evaluated as a test for the evaluation of fetal health. This study was conducted with the aim of systematically summarizing recent studies on the effect of STIMULATION with VIBROACOUSTIC and halogen light on the fetus.Materials and Methods: In this review study, in order to retrieve relevant national and international studies published from 1990 to 2017, the researchers extensively searched the following databases: magirin, irandoc, SID, Google scholar, Scopus, PubMed, and science direct. English keywords included “VIBROACOUSTIC” and “halogen light”. The papers that had the highest similarity with our review title were entered into the study, and the results were reported.Results: Finally, 15 papers that investigated the effect of halogen light and VIBROACOUSTIC STIMULATION were studied. There was a correlation between fetal heart rate, fetal health assessment, and STIMULATION with VIBROACOUSTIC and halogen light (P<0.05).Conclusion: In general, according to the findings of most studies, there is a correlation between the effect of STIMULATION with VIBROACOUSTIC and halogen light and fetal health and fetal movement tests. Since STIMULATION with VIBROACOUSTIC and halogen light reduce the incidence of non-reactive fetal heart rate, this tool can be used safely and effectively in maternal health assessment centers to improve fetal non-stress test.

The cabin of a road vehicle contains multiple noise sources, which can be airborne or structure-borne. These sources include the transmission, engine, tire and road contact noise, aerodynamics noise, and more. The noise in the cabin can significantly affect passenger comfort. Therefore, it is crucial to have an accurate VIBROACOUSTIC model for analyzing and controlling vibrations. However, creating a simulation that closely reflects reality using a finite element model is highly complex. This complexity stems from the large number of degrees of freedom in the model, which requires significant computational resources for simulation. To overcome these challenges, various model order reduction (MOR) techniques for linear or nonlinear models have been developed. MOR has two approaches: projection data-based and equivalent model energy-based. In this paper, we utilize two MOR methods to simulate a reduced coupled model. The first method is based on the Krylov subspace method, which uses projection bases to reduce the large linear model. The second method is the modal coupling method, which uses the mode shape of the model to create a reduced model. Finally, we compare the pressure and displacement of the reduced model to the model at different frequency spectra.

The purpose of this article is to provide an analytical model of the VIBROACOUSTIC for an elastic beam submerged in low subsonic flows with mean velocities. In general, VIBROACOUSTIC modeling refers to the combined effects of sound propagation and mechanical vibration of the structure. Sound radiations from submerged structures are coupled with physical phenomena because the sound pressures acting on structure surfaces and the dynamic responses of structures will impact each other. The Rayleigh Theory has been used to derive the beam vibration equations, and Green's functions are used to find the response of vibrations and the propagation of sound waves from the elastic beam. Initially, we solve the differential equation governing the Rayleigh beam under harmonic load. Then, the sound wave propagation equation around the beam is solved. The solution of the vibration and sound propagation differential equations must be done in the form of couplings so that at first distinct Green's function is obtained for each of the differential equations, and then by combining these two Green's functions, a coupled response function is found to solve the problem. Further, the VIBROACOUSTIC response of the beam was obtained by applying the boundary conditions at the interface between the beam and the fluid. In order to evaluate the process of analysis and validation, the results are compared with the results of other researchers and a good match between the results is observed; then, the effects of fluid velocity and useful parameters on the sound field have been investigated.