Visualizing method for three dimensional standing wave sound fie

Details Visualizing method for three dimensional standing wave sound fie Visualizing method for three dimensional standing wave sound fie

1990-03-16

1991-12-17

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

367191, 181 05, H04B 102

Patent

active

RE0337714

ABSTRACT:
A visualizing method for three dimensional standing wave sound field comprises the steps of mixing into a liquid medium a large number of fine particles of the same density as said liquid medium and exposing the liquid medium containing the fine particles to a three dimensional standing wave sound field produced by ultrasonic waves thus causing the fine particles to move to positions where the amplitude of the sound pressure is minimum, the sound pressure distribution of the three dimensional standing wave sound field being visualized by the distribution of the fine particles.

REFERENCES:
patent: 3878617 (1975-04-01), West et al.
patent: 4055491 (1977-10-01), Dorath-Furedi
patent: 4523682 (1985-06-01), Barmatz et al.
patent: 4759775 (1988-07-01), Peterson et al.
patent: 4773266 (1988-09-01), Barmatz et al.

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