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2 2010

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Wave Generation by a Finite Baffle Array in Application to Beam-Forming Analysis

Tasinkevych Y.

Archives of Acoustics

2010

Vol. 35, No. 4

677-686

Directional excitation of sound in an aperiodic finite baffle system is analyzed using a method developed earlier in electrostatics. The solution to the corresponding boundary value problem is obtained in the spatial-frequency domain. The acoustic pressure and normal particle velocity distribution in acoustic media can be easily computed by the inverse Fourier transform from their spatial spectra on the baffle plane. The presented method can be used for linear acoustic phased arrays modeling with finite element size and inter-element interactions taken into account. Some illustrative numerical examples presenting the far-field radiation pattern and wavebeam steering are given.

Full-wave Analysis of Periodic Baffle System in Beamforming Applications

Tasinkevych Y., Danicki E.

Archives of Acoustics

2010

Vol. 35, No. 4

661-675

Mixed boundary-value problem for periodic baffles in acoustic medium is solved with help of the method developed earlier in electrostatics. The nice feature of the method is that the resulting matrices are relatively easy for computations and that the results satisfy exactly the energy conservation law. Illustrative numerical examples present the wave-beam steering (in the far-field) in a baffle system that may be considered as a model of one-dimensional ultrasonic transducer array.