This paper presents noise problems associated with the use of air-turbine drills in dental practice. Two hundred and fifty dentists (male and female) were randomly selected from the faculty of dentistry as well as the dentists who worked private in Tehran. The results indicated that the mean value of sound pressure level produced by the high-speed drills was 69.1 db. Most of the energy from...

Determining the sound speed $c_s$ in compact stars is an important open question with numerous implications on behaviour of matter at large densities and hence gravitational-wave emission from neutron stars. To this scope, we construct more than $10^7$ equations state (EOSs) continuous build $10^8$ nonrotating stellar models consistent not only nuclear theory perturbative QCD, but also astronom...

Sound processing is one the subjects that newly attracts a lot of researchers. It is efficient and usually less expensive than other methods. In this paper the flow generated sound is used to estimate the flow speed of free flows. Many sound samples are gathered. After analyzing the data, a parameter named wave power is chosen. For all samples the wave power is calculated and averaged for each ...

We build upon the remarkable, model independent constraints on equation of state dense baryonic matter established recently by Annala et al. [1]. Using quark-meson coupling model, an approach to nuclear structure based self-consistent adjustment hadron local meson fields, we show that, once hyperons are allowed appear in \b{eta}-equilibrium, is consistent with those constraints. As a result, wh...

In this paper, the acoustic environment in a vehicle cabin under the influence of highfrequencies aerodynamic sources has been studied. Some panels on the windshield, the roof, the doors, the front pillars, and the floor of a vehicle simulated as input source of noise when the car is moving at high speed, i.e. 112 km/h. The status of vehicle cabin in each of these modes has been studied and com...

Sound processing is one the subjects that newly attracts a lot of researchers. It is efficient and usually less expensive than other methods. In this paper the flow generated sound is used to estimate the flow speed of free flows. Many sound samples are gathered. After analyzing the data, a parameter named wave power is chosen. For all samples the wave power is calculated and averaged for each ...

in this paper, for the purpose of investigating horizontal sound propagation, based on the results obtained from practical measurements in the strait of hormoz and available data on sound speed variations at different depths, a comprehensive model for shallow water multipath underwater acoustic channel is presented. mathematical modeling of multipath effect is based on ray theory and the image ...