Inspec keywords: acoustic impedance; transient response; ultrasonic velocity measurement; thickness measurement; ultrasonic materials testing; Fourier transforms; piezoelectric transducers

Other keywords: layer thickness measurement; time resolution; pulse-echo method; piezoelectric transducer; ultrasound transit time determination; inverse Fourier transform; thin layers; reflection coefficient; acoustic input impedance; transient response elimination

Subjects: Materials testing; Spatial variables measurement; Sonic and ultrasonic applications; Sonic and ultrasonic transducers; Nondestructive testing; Measurement by acoustic techniques; Transduction; devices for the generation and reproduction of sound; Piezoelectric and ferroelectric devices; Spatial variables measurement