Time-Domain Pulse Analysis as a Substitute for Ultrasonic Spectroscopy.
Abstract
A computer method, based on fast Fourier transformation principles, has been used to study various types of pulsed signals and their associated spectral functions. Theoretical criteria were developed for generating a pulse that exhibits a broad, uniform spectrum while satisfying the practical requirements of the electronic instrumentation currently available for ultrasonic testing purposes. Further investigation was made of how the time-domain appearance of such a broad-spectrum pulse is changed if the signal is subjected to various forms of frequency-dependent attenuation. The results obtained demonstrate the feasibility of establishing a systematic correlation between pulse shape and attenuation function. This leads to the conclusion that ultrasonic attenuation phenomena can be examined by means of a time-domain signal analysis in lieu of the more involved spectrum analysis. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1981
- Accession Number
- ADA098385
Entities
People
- Otto R. Gericke
Organizations
- United States Army Research Laboratory