Influence of Material Property and Geometry on Acoustic Wave Propagation| Chapter 3 | Science and Technology: Recent Updates and Future Prospects Vol. 10

 

The numerical analysis by finite element method offers new and efficient possibilities for different parameter calculus of acoustics phenomena. This paper presents some authors’ results regarding numerical modelling of the acoustic wave propagation, using the Ansys program. The Ansys program has in its finite element library dedicated elements for plane and spatial problems and other specific facilities about which more information is presented in this paper.  The acoustic wave propagation is studied under conditions of the existence of acoustic absorbing panels. Different materials are taken into account (aluminium, foam, oak, polystyrene) for considered acoustic absorbing panels. Also, different dimensions and different cases for fixing the panels were considered. The acoustic wave propagation was studied in stationary conditions and dynamic conditions at different values of sound frequencies. A comparative analysis is performed regarding the influence of different conditions on acoustic wave propagation. Our studies presented in this paper refer to acoustic propagation in an open space, like in airports or around acoustic sources placed in the open space. The aim of this paper is to offer our experience in this field for a numerical analysis of the ways for sound level reduction. Also, the facilities of the Ansys program for the solving of such problems are presented in a practical manner of use.

Author(s) Details

Vasile Nastasescu
“Ferdinand I Military” Technical Academy, Bucharest, Romania.

Ghita Barsan
“Nicolae Balcescu” Land Forces Academy, Sibiu, Romania.

 

Oana-Alexandra Mocian
“Ferdinand I Military” Technical Academy, Bucharest, Romania.

 

Please see the book here:- https://doi.org/10.9734/bpi/strufp/v10/1245

Bioelectronic Interpretation of Human Cognitive Processes | Chapter 7 | Contemporary Research and Perspectives in Biological Science Vol. 9

The idea of coupling chemical-electronic processes with cybernetic-informational processes in a biological system is currently completely foreign in the area of classical life research. The aim of this work is to direct attention towards filling this type of cognitive gap. Human life is not only a matter of biology and biochemistry, it is also a quantum-cybernetic-informational and bioelectronic construction that affects human health, disease and behavior. The chemical power supply of a biological system is combined with electronic processes operating on organic semiconductors together with the function of piezoelectrics, pyroelectrics and ferroelectrics. The control of the human biological system is carried out through a network of information channels, electron, ion, photon, phonon, soliton, magnon - free radical, as well as bioplasmic - each of these channels can be a carrier of information for the biological system in itself, or can function collectively in the bioplasma system (Sedlak 1980; Adamski 2006 a). The action of solitons and spins in the human biological system provides a basis for viewing psychobiological processes in a different light than biology, psychology and medicine currently do. Spin and soliton waves create a different image of the world from the electromagnetic wave received by the visual receptor. Solitons generated in the heart are responsible for the electrical activity of the heart, as well as for emotional states in humans.  It can be concluded that we are dealing with a second center that creates the structure of the image of the world and is responsible for the psychophysical development of humans, health and disease.

 

Author (s) Details

 

Adam Adamski
Faculty of Ethnology and Educational Science in Cieszyn, University of Silesia in Katowice, Poland.

 

Please see the book here:- https://doi.org/10.9734/bpi/crpbs/v9/3798