The modal projector

The superposition of acoustical modes radiated from a transducer can provide directionality from a compact projector. This paper presents the foundation, as well as examples, of piezoelectric ceramic, piezoelectric single crystal, and magnetostrictive versions of this "modal projector." Me...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2011-04, Vol.129 (4), p.1881-1889
Main Authors: Butler, John L., Butler, Alexander L., Butler, Stephen C.
Format: Article
Language:English
Subjects:
Acoustics
Acoustics - instrumentation
Ceramics
Directivity
Electronics
Exact sciences and technology
Finite Element Analysis
Foundations
Fundamental areas of phenomenology (including applications)
Magnetics
Magnetostriction
Mathematical analysis
Models, Theoretical
Physics
Piezoelectricity
Projectors
Transducers
Transduction
acoustical devices for the generation and reproduction of sound
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Summary:The superposition of acoustical modes radiated from a transducer can provide directionality from a compact projector. This paper presents the foundation, as well as examples, of piezoelectric ceramic, piezoelectric single crystal, and magnetostrictive versions of this "modal projector." Measured and analytical, as well as finite element analysis modeled, results show good agreement and establish this transducer as a viable source of intensity with the advantages of an improved directivity index, reducing the power needed from a compact source.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3559684