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Titolo:
PHASE-CONJUGATION IN THE OCEAN - EXPERIMENTAL DEMONSTRATION OF AN ACOUSTIC TIME-REVERSAL MIRROR
Autore:
KUPERMAN WA; HODGKISS WS; SONG HC; AKAL T; FERLA C; JACKSON DR;
Indirizzi:
UNIV CALIF SAN DIEGO,SCRIPPS INST OCEANOG,MARINE PHYS LAB LA JOLLA CA92093 SACLANT UNDERSEA RES CTR LA SPEZIA ITALY UNIV WASHINGTON,APPL PHYS LAB SEATTLE WA 98105
Titolo Testata:
The Journal of the Acoustical Society of America
fascicolo: 1, volume: 103, anno: 1998,
pagine: 25 - 40
SICI:
0001-4966(1998)103:1<25:PITO-E>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
W.A. Kuperman et al., "PHASE-CONJUGATION IN THE OCEAN - EXPERIMENTAL DEMONSTRATION OF AN ACOUSTIC TIME-REVERSAL MIRROR", The Journal of the Acoustical Society of America, 103(1), 1998, pp. 25-40

Abstract

An experiment conducted in the Mediterranean Sea in April 1996 demonstrated that a time-reversal mirror (or phase conjugate array) can be implemented to spatially and temporally refocus an incident acoustic field back to its origin. The experiment utilized a vertical source-receiver array (SRA) spanning 77 m of a 125-m water column with 20 sourcesand receivers and a single source/receiver transponder (SRT) colocated in range with another vertical receive array (VRA) of 46 elements spanning 90 m of a 145-m water column located 6.3 km from the SRA. Phaseconjugation was implemented hv transmitting a 50-ms pulse from the SRT to the SRA digitizing the received signal and retransmitting the time reversed signals from all the sources of the SRA. The retransmitted signal then was received at the VRA. An assortment of runs was made toexamine the structure of the focal point region and the temporal stability of the process. The phase conjugation process was extremely robust and stable, and the experimental results were consistent with theory. (C) 1998 Acoustical Society of America.

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Documento generato il 12/07/20 alle ore 06:38:24