Submitted on: 14 January 2012.
Revised on: 07 February 2012.
Accepted on: 30 March 2012.
___________________JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
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Submitted on: 28 September 2007.
Revised on: 15 November 2007.
Accepted on: 10 December 2007.
___________________JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL