시역전 기법을 이용한 음향신호의 재현

Title
시역전 기법을 이용한 음향신호의 재현
Alternative Title
Acoustic Signal Reconstruction using Time Reversal Acoustic Technique
Author(s)
최복경; 김봉채; 김병남; 한주영; A. Sutin; A. Sarvazyan
KIOST Author(s)
Choi, Bok Kyoung(최복경)Kim, Byoung Nam(김병남)
Publication Year
2009-09-21
Abstract
The concept of Time Reversal Acoustics(TRA) provides an elegant possibility of both temporal and spatial concentrating of acoustic energy in highly inhomogeneous media. We explored a possibility of generating acoustical signals with arbitrary waveforms using the TRA Focusing System(TRA FS). A method of prediction of the TRA focused ultrasound waveforms using the measurements of transfer function relating the signal at the TRA transmitter to that at the focusing point has been developed. The developed approach forTRA focused signal waveform prediction from the results of direct signal easurements was tested on 10 channel TRA FS based on aluminum resonator with glued piezotransducers. The TRA FS operated in the frequency band of 100‐1000 kHz. The formation of ultrasonic signals with various envelopes was demonstrated experimentally. The calculated and experimentally measured waveforms were practically identical. We formed triangular, rectangular, and amplitude modulated tone burst signals with different modulation frequencies in the focal region. The level of side lobes in the generated signalswas much lower than that for standard TRA focusing.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29344
Bibliographic Citation
The 10th Western Pacific Acoustics Conference, pp.1 - 8, 2009
Publisher
서태평향 음향학술 위원회
Type
Conference
Language
English
Publisher
서태평향 음향학술 위원회
Related Researcher
Research Interests

Underwater Acoustics,Bubble Acoustics,Marine Defense & Safety,수중음향,기포음향,해양방위·안전

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