Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Focused ultrasonic transducers can be useful in material characterization and tissue property measurement because of the improved signal to noise ratio as compared to flat transducers. To fully understand the transducer output, it is useful to know the system transfer function or impulse response of a focused transducer first acting as a transmitter and then receiving the signal reflected off a rigid plane. The resulting received pressure of a pulse-echo system can also be characterized in terms of a diffraction correction factor. The determination of the impulse response or diffraction correction factor is well understood for flat disk transducers, but is more complex for focused transducers.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16A

Chapter

Chapter 4: NDE Sensors

Section

UT Fields and Probes

Pages

869-875

DOI

10.1007/978-1-4615-5947-4_113

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Response of a Focused Transducer Facing a Rigid Reflector

Brunswick, ME

Focused ultrasonic transducers can be useful in material characterization and tissue property measurement because of the improved signal to noise ratio as compared to flat transducers. To fully understand the transducer output, it is useful to know the system transfer function or impulse response of a focused transducer first acting as a transmitter and then receiving the signal reflected off a rigid plane. The resulting received pressure of a pulse-echo system can also be characterized in terms of a diffraction correction factor. The determination of the impulse response or diffraction correction factor is well understood for flat disk transducers, but is more complex for focused transducers.