Design of an ultrasonic piezoelectric transducer having double-linked diaphragms for parametric speakers
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- Kuroda Jun
- Department of Intermedia Art and Science, Waseda University
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- Oikawa Yasuhiro
- Department of Intermedia Art and Science, Waseda University
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- Yamasaki Yoshio
- Waseda University
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- Sato Shigeo
- NEC Corporation
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- Komoda Motoyoshi
- NEC Corporation
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- Onishi Yasuharu
- NEC Corporation
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Abstract
Small highly efficient ultrasonic transducers are in high demand to fabricate compact parametric speakers. We focus on small piezoelectric transducers that can be used for ultrasonic emitters of parametric speakers. Typical small piezoelectric transducers have piezoelectric boards and radial cones. We propose a transducer consisting of a unimorph diaphragm and a flat metal plate. This structure gives two resonant peaks, which are determined by the physical parameters and dimensions of the diaphragms, the flat plate, and their junction structure. Controlling these resonant peaks is one approach to fabricating transducers having the ideal frequency response of the sound pressure for parametric speakers. We devised a design to control these two resonant peaks by adjusting the junction structure of the diaphragm and the flat plate. Using the results of a theoretical analysis, we designed an improved transducer that satisfies the ideal frequency response for parametric speakers.
Journal
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- Acoustical Science and Technology
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Acoustical Science and Technology 36 (5), 385-396, 2015
ACOUSTICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282680065064064
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- NII Article ID
- 130005097246
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- NII Book ID
- AA11501808
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- ISSN
- 13475177
- 03694232
- 13463969
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- NDL BIB ID
- 026703732
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed