Other

Jeju National University Industry-Academic Cooperation Foundation

Min Joo Choi

Mok Kun Jeong

Sung Jae Kwon

Seong Chan Kim

Oh Bin Kwon

Jong Min Kim

Gwan Suk Kang

Sung Joung Jeon

Geum Na Hong

Tae Hyo Jang

An acoustic output of therapeutic devices used in shock wave therapy can be obtained by measuring the pressure waves radiated from the pressure wave transducer in water. Since the pressure waves used in shock wave therapy generate severe bubbles in water, measuring the surface vibrations of the pressure wave transducer using the laser Doppler method includes significant noise caused by the bubbles. This invention utilizes a filter generated to eliminate the noise in the vibration signals measured by the laser Doppler method, which is caused by the bubbles. The filter is generated by comparing the vibration signals measured in degassed distilled water with the reference signals measured in air at the minimum output setting of the shock wave generation device. Using the filter, it is possible to estimate the vibration signals of the pressure wave transducer generated underwater under the set conditions of the specific shock wave generating device.

Method for measuring vibration of mechanical wave transducers using laser doppler method

A sequential image photographing device for photographing sequential images of an object to be observed includes: an illuminating unit configured to sequentially irradiate a plurality of light having different wavelength bands to the object; a digital camera configured to photograph the object illuminated by the plurality of the light emitted from the illuminating unit; a controller controlling the illuminating unit and the digital camera; and an image processing unit configured to extract a plurality of channel images corresponding to the respective wavelength band from the image photographed by the digital camera and to obtain the sequential images of the object.

Device of photographing ultra-high-speed sequential images

A method for displaying a passive cavitation image that shows characteristic information of a passive cavitation includes: receiving an ultrasound signal caused by the passive cavitation; generating a plurality of first passive cavitation images for the passive cavitation at predetermined respective time frame using the received ultrasound signal by a DAS beam forming; generating a plurality of second passive cavitation images in which a maximum magnitude signal region is displayed by selecting a main lobe region having a magnitude greater than or equal to a predetermined value in the respective first passive cavitation image; generating a main lobe passive cavitation image in which a main region is displayed in the respective time frame by superimposing the plurality of the second passive cavitation images obtained for the respective time frame; and generating a passive cavitation image by displaying the main lobe passive cavitation image on a background image.

Method and device for displaying passive cavitation image

An apparatus for optimizing a binaural beat according to an embodiment of the present invention includes: a binaural beat generator that generates a binaural beat; and a binaural beat controller that optimizes the binaural beat in consideration of a hearing state of left and right ears of a listener. A method for optimizing a binaural beat according to an embodiment of the present invention includes: generating a binaural beat; and optimizing the binaural beat in consideration of a hearing state of left and right ears of a listener.

Method and apparatus for optimization of binaural beat

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Jeju-si, South Korea

Min Joo Choi