The motivation for this work came through a casualremark  made by Dr. N. Seshagiri, former Chairman, Electronics Commission to thesecond author, about the ancient belief in the efficacy of mantras. The authorswish to thank him. Help and encouragement were received from Prof. T. V.Srinivas of the Indian Institute of Science, Bangalore, Dr. N. Chandrasekhara ofM/s Datalogic Pvt.Ltd., and from Sri Peetabasa Pati of the Indian Institute ofScience. The voices were lent by Ms Vasundhara, Sri Chandrasekharan and thefirst two authors. Sri Raghavendra helped in the voice recordings and theiranalysis. This work forms part of the MS dissertation of the first author,submitted to the Hindu University of America, Florida, USA.

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