Ultrasound medium characteristics measuring apparatus
US4723553A · kind A · utility
39Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Jun 26, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring acoustic characteristic values of a medium by sending ultrasound pulses into the medium and analyzing the reflected waves from the medium. Medium characteristic values are extracted from the reflected waves, and spectrum scalloping is eliminated. The present invention executes the nonlinear filtering process, for example, the median filtering process to the spectrums, applies a model spectrum to the filtered result and thereby facilitates measurement of supressing fluctuation even when a small number of space average samples one used, by obtaining .beta. from such model spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.