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Wave propagation analysis in spiral geometries
and K. R. Nayak
, “ Wave propagation in 1-D spiral geometry
S. K. Rath and P. C. Naik, “ On acoustic theory of conch shell,” Current Sci. 99(6), 790–795 (2010).
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In this paper wave propagation in strings of exponential and conical spiral geometries and in an exponential spiral horn of increasing circular cross-section area is studied. The three-dimensional wave equation in cylindrical coordinates is investigated, as the theoretical
solution in the exponential spiral horn is derived and in the case of the strings, numerical simulation mainly using a centered in time and space finite difference scheme is carried out. The results suggest non-harmonic resonance modes in both of the conical and exponential spiral strings.
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