title: Ring piezoelectric transducers radiating ultrasonic energy into the air.
abstract: Ring piezoelectric transducers generating ultrasonic energy in air were designed and tested experimentally and numerically. The radiation pattern of the transducer is very narrow (4 degrees ) and its frequency response has a broadband character. Resonant frequencies of the transducers were determined experimentally and verified theoretically. Applications of the proposed ring transducers in a robotic ranging system were examined.
authors.affiliation: Inst. of Fundamental Technol. Res., Polish Acad. of Sci., Swietokrzyska.
authors.forename: P J
authors.initials: PJ
authors.lastname: Kielczynski
authors.forename: W
authors.initials: W
authors.lastname: Pajewski
authors.forename: M
authors.initials: M
authors.lastname: Szalewski