Centre Frequency Selection for Active Sonar

M. Rajeswari*, S. Koteswara Rao**, B.L.Prakash***
* M.Tech Scholar, Department of ECE, Vignan's Institute of Information Technology, Visakhapatnam, A.P., India
** Sr. Professor, Department of ECE, Vignan's Institute of Engineering for Women, Visakhapatnam, A.P., India.
*** Professor, Department of ECE, Vignan's Institute of Information Technology, Visakhapatnam, A.P., India
Periodicity:October - December'2014
DOI : https://doi.org/10.26634/jdp.2.4.3143

Abstract

Attenuation of sound is the process of decay in the amplitude due to combination of absorption and scattering. Transmitted pulse is influenced by many factors for selecting the center frequency of active sonar. For example, for a fixed size transmitter array with constant radiated power, ambient noise decreases with frequency and the source level increases with frequency. These considerations would suggest the use of high center frequency. On other hand the absorption of the medium increases with frequency Here, in this paper the relationship between the range and optimum frequency is derived which helps in selecting the center frequency.

Keywords

Attenuation Coefficient, Center Frequency, Echo Excess.

How to Cite this Article?

Rajeswari.M.,Rao,K.S.,Prakash.B.L.,(2014). Centre Frequency Selection for Active SONAR. i-manager’s Journal on Digital Signal Processing, 2(4), 14-18. https://doi.org/10.26634/jdp.2.4.3143

References

[1]. Urick, Robert J. (1975). 'Principle of Underwater Sound', McGraw-Hill.
[2]. Michael A. Ainslie, (2010). 'Principles of Sonar Performance Modeling', Springer New York.
[3]. A. D. Waite, (2002). 'SONAR for Practising Engineers', Third Edition, Wiley.
[4]. Richard 0 Neilson, (1991). Sonar Signal Processing, Artech House.
[5]. Stewart, J.L., E.C. Westerfield, and M.K.Brandon, (1961). “Optimum Frequencies for Active Sonar Detection, J. Acoustical Society of America, Vol. 33. No.9, pp, 1216- 1222.

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