Title :
Bridging the gap of impedance mismatch between air and solid materials
Author :
Gómez, Tomás E. ; Montero, Francisco
Author_Institution :
Inst. de Acustica, CSIC, Madrid, Spain
Abstract :
Resonant impedance matching layers for air-coupled ultrasonic applications in the range 0.4-2 MHz are presented. Their special properties make it possible to attach them easily to the surface of a piezoelectric transducer and/or to cover over the material under test. A detailed study of the properties of porous materials to produce matching layers as well as the efficiency of them is presented
Keywords :
impedance matching; piezoelectric transducers; porous materials; ultrasonic materials testing; ultrasonic transducers; 0.4 to 2 MHz; air-coupled ultrasonic applications; impedance mismatch; piezoelectric transducer; porous materials; resonant impedance matching layers; Attenuation measurement; Couplings; Frequency; Impedance matching; Materials testing; Resonance; Sheet materials; Solids; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921509
