• The Journal of the Acoustical Society of Korea
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• v.19 no.7
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• pp.3-6
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• 2000

Because the generally reported radiation impedance has been calculated for vibrating surface with infinite baffle, the results have difficulties to apply for design of the real transducers with finite baffle. In this paper, with assuming a vibrating surface as a set of small point sources, a new calculation method for the vibrating surface with finite baffle is suggested by considering the effect of finite baffle on the source strength of each point source. As an example, the variation of self-radiation impedance for rectangular vibrating surface is calculated according to the size of baffle. The results show that the suggested method is useful.

• The Journal of the Acoustical Society of Korea
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• v.36 no.2
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• pp.108-114
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• 2017

We have experimentally analyzed the self-radiation impedance of an ultrasonic transducer with a square radiation surface that is used as a vibrator in underwater ultrasonic detection systems. The radiation reactance and the radiation resistance were measured in the range from 1 to 3 of ka that is the product of a wave number and a length of the edge of the square vibrator. By comparing the measured results with those of theoretical calculation of the radiation impedance using a series, we confirmed the validity of the experimental method and experimentally confirmed the variation trend in the radiation impedance of the square radiation surface.

• The Journal of the Acoustical Society of Korea
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• v.19 no.7
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• pp.85-89
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• 2000

In this paper, by extending the previously developed self- and mutual-radiation impedance calculation method for a regular-square vibrating surface by using numerical series, we proposed a method to obtain the self-radiation impedance of a rectangular transducer with an arbitrary integer ratio of the length to width. The proposed method exhibits high accuracy and a short computation time. After investigating the accuracy and computation time as the number of elements changes, we have calculated the self-radiation impedance of several rectangular transducers, and compared the results with those in the literature.