Visualizing method for three dimensional standing wave sound field
First Claim
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1. A visualizing method for three dimensional standing wave sound field comprising:
- charging into a container equipped with an ultrasonic wave transmitter a medium consisting essentially of a liquid and a plurality of fine particles of the same density as said liquid, andcausing said ultrasonic wave transmitter to transmit into said container ultrasonic waves of a frequency capable of forming a standing wave,whereby said fine particles .[.ar.]. .Iadd.are .Iaddend.caused to move to positions where the amplitude of the sound pressure is minimum and the sound pressure distribution of the three dimensional standing wave sound field is visualized by the distribution of the fine particles.
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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.
6 Citations
8 Claims
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1. A visualizing method for three dimensional standing wave sound field comprising:
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charging into a container equipped with an ultrasonic wave transmitter a medium consisting essentially of a liquid and a plurality of fine particles of the same density as said liquid, and causing said ultrasonic wave transmitter to transmit into said container ultrasonic waves of a frequency capable of forming a standing wave, whereby said fine particles .[.ar.]. .Iadd.are .Iaddend.caused to move to positions where the amplitude of the sound pressure is minimum and the sound pressure distribution of the three dimensional standing wave sound field is visualized by the distribution of the fine particles. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for separating from a liquid medium fine particles of the same specific gravity as said liquid medium comprising:
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charging into a container equipped with an ultrasonic wave transmitter a medium consisting essentially of a liquid and containing a large number of particles of the same density as said liquid, and causing said ultrasonic wave transmitter to transmit into said container ultrasonic waves of a frequency capable of forming a standing wave, thereby causing .[.said.]. .Iadd.a .Iaddend.large number of .Iadd.said .Iaddend.fine particles to collect at the positions where the amplitude of the sound pressure is minimum, and sucking said fine particles out from the regions at which they collect within the container through fine tubes inserted into said container.
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Specification
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Current AssigneeAgency for Industrial Science and Technology, Ministry of International Trade & Industry (Government of Malaysia)
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Original AssigneeAgency for Industrial Science and Technology, Ministry of International Trade & Industry (Government of Malaysia)
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InventorsMitome, Hideto
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Primary Examiner(s)Pihulic, Daniel T.
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Application NumberUS07/494,391Time in Patent Office641 DaysField of Search367/137, 367/191, 181/0.5, 73/505, 209/163US Class Current367/137CPC Class CodesG01H 3/10 Amplitude; PowerG10K 15/00 Acoustics not otherwise pro...
