title: The transducer vibratory profile effects on the detection of the transient ultrasonic field scattered by a rigid point reflector.
abstract: In this study a generalized approach, based on the impulse response technique, is developed to evaluate the transient ultrasonic field scattered by a rigid point reflector and detected by a planar circular transducer characterized by a non-uniform vibratory profile. For this purpose, several analytical functions are used to represent the non-uniform vibration amplitude of the transducer. All these functions have maximum amplitude at the transducer's center and decrease monotonically away from axis. The amplitude variation of these functions has a direct effect on the shape of the average pressure detected by the transducer. Some numerical results are presented to illustrate the effects of a non-uniformly vibrating source on the detected transient pressure. The results show the relative importance of the edge wave modifications in the case of source having non-uniform vibration amplitude distribution.
authors.affiliation: Faculté d'Electronique and Informatique, Université des Sciences et de la Technologie Houari Boumediene, BP32, El Alia, 16111 Bab Ezzouar, Algeria. hassinakhelladi@yahoo.fr
authors.forename: Hassina
authors.initials: H
authors.lastname: Khelladi
authors.forename: Hakim
authors.initials: H
authors.lastname: Djelouah
mesh_terms: D008962:Models, Theoretical; D014159:Transducers; D014465:Ultrasonics; D014732:Vibration