Piezoelectric transducers for air-coupled operation in the frequency range 0.3-2.5 MHz

6 pages, 4 figures.-- PACS nrs.: 43.38.Ar, 43.38.Fx.-- Communication presented at: Forum Acusticum Sevilla 2002 (Sevilla, Spain, 16-20 Sep 2002), comprising: 3rd European Congress on Acoustics; XXXIII Spanish Congress on Acoustics (TecniAcustica 2002); European and Japanese Symposium on Acoustics; 3rd Iberian Congress on Acoustics.-- Special issue of the journal Revista de Acustica, Vol. XXXIII, year 2002.

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