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Patil, Hemant A., and Shrishail S. Gajbhar."Acoustical analysis of musical pillar of great stage of Vitthala temple at Hampi, India." In 2012 International Conference on Signal Processing and Communications (SPCOM)2012 International Conference on Signal Processing and Communications (SPCOM), 1-5. Bangalore, Karnataka, India: IEEE, 2012.

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In this paper, we present the spectral analysis of the sound recorded from a musical pillar at Vitthala temple, Hampi - a world heritage site. The pillars in this temple have musical columns which produce sounds of different musical instruments when struck with a thumb (i.e., a kind of impulse-like excitation). The sound recorded from a pillar is found to produce bell-like sound. In addition, an analysis is presented to model dynamics of such columns in a pillar to find the flexural frequencies along with its eigenmodes. It was observed that there is close correlation between spectral (i.e., resonance) characteristics of bell-like sound from pillar and actual bell sound. The measured frequencies of pillar have also been found to be in close agreement with flexural frequencies derived from Euler-Bernoulli beam model and energy separation algorithm (ESA) based on Teager's energy operator. This model correctly predicts the resonant frequencies of the bell-like sound from the musical columns of the pillar.


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