Method and apparatus for measuring acoustic characteristics and

Details Method and apparatus for measuring acoustic characteristics and Method and apparatus for measuring acoustic characteristics and

1988-11-01

1990-06-26

Jaworski, Francis

Surgery

Truss

Pad

128736, A61B 800

Patent

active

049363085

ABSTRACT:
An acoustic characteristic measurement method comprising transmitting into a specimen an ultrasonic probe pulse and a pulse formed by the superposition of the probe pulse centroid on a pump pulse of a lower frequency than that of the probe pulse at a portion where the particle acceleration of the pump pulse is at a peak, receiving reflections of the transmitted signal from two or more reflecting points that are at different depths in the specimen, frequency-analyzing the received signals and obtaining a spectral ratio, and using the spectral ratio to measure the distribution in the specimen of the degree of spectral separation and the crossover frequency.

REFERENCES:
patent: 4566460 (1986-01-01), Sato et al.
patent: 4610255 (1986-09-01), Shimura et al.
patent: 4754760 (1988-07-01), Fukukita et al.
patent: 4817615 (1989-04-01), Fukukita et al.

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