Abstract
A conflict exists in ultrasonic measurements between the resolution, which requires higher frequency, and the penetration depth, which requires long wavelength. The traditional pulse–echo method for sound velocity measurement fails when the sample becomes too thin to allow the separation of repeated echoes. A signal processing scheme in frequency domain is described here to maximize the resolution of broadband transducers. The Wiener optimum filtering factor is used, together with the multiple sampling average technique, for power spectrum calculation. Using a broadband 2-MHz center frequency ultrasonic transducer, the sound velocity was successfully measured in brass shims as thin as 5% of the wavelength λ.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
