Journal of Pure and Applied Ultrasonics

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Characteristics of an Ultrasonic Array Transmitter in the Short Range


Affiliations
1 Department of Electrical and Electronics Engineering, Aichi Institute of Technology, 1247, Yachigusa, Yakusa-Cho, Toyota, 470-0392, Japan
 

An ultrasonic array transmitter (12 × 12) has been developed and its theoretical studies were conducted in the short range. In the far field (>5 m), sound pressure level decreases exponentially with the distance. We have studied the effects of short pulse modulation on the array transmitter in the range from 0.5 m to 2 m to compare with our theoretical results. The sound pressure amplitude reduction in this region by 1/r does not follow the same as in the case of far field. The sound pressure level at 1 m wasabove 143 dB which can be considered to be useful for the biomedical applications.We also studied the normal reflected pulse from living and non-living object.

Keywords

Ultrasonic Array Transmitter, Short Range, Pulse Modulation.
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  • Characteristics of an Ultrasonic Array Transmitter in the Short Range

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Authors

Sahdev Kumar
Department of Electrical and Electronics Engineering, Aichi Institute of Technology, 1247, Yachigusa, Yakusa-Cho, Toyota, 470-0392, Japan
Hideo Furuhashi
Department of Electrical and Electronics Engineering, Aichi Institute of Technology, 1247, Yachigusa, Yakusa-Cho, Toyota, 470-0392, Japan

Abstract


An ultrasonic array transmitter (12 × 12) has been developed and its theoretical studies were conducted in the short range. In the far field (>5 m), sound pressure level decreases exponentially with the distance. We have studied the effects of short pulse modulation on the array transmitter in the range from 0.5 m to 2 m to compare with our theoretical results. The sound pressure amplitude reduction in this region by 1/r does not follow the same as in the case of far field. The sound pressure level at 1 m wasabove 143 dB which can be considered to be useful for the biomedical applications.We also studied the normal reflected pulse from living and non-living object.

Keywords


Ultrasonic Array Transmitter, Short Range, Pulse Modulation.

References