US 11,988,772 B2
Remote recovery of acoustic signals from passive sources
Yu Rong, Tempe, AZ (US); Daniel W. Bliss, Phoenix, AZ (US); Sharanya Srinivas, Cambridge, MA (US); and Adarsh Venkataramani, Tempe, AZ (US)
Assigned to Arizona Board of Regents on behalf of Arizona State University, Scottsdale, AZ (US)
Appl. No. 17/773,503
Filed by ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
PCT Filed Oct. 30, 2020, PCT No. PCT/US2020/058326
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/087337, PCT Pub. Date May 6, 2021.
Claims priority of provisional application 62/929,140, filed on Nov. 1, 2019.
Prior Publication US 2023/0003835 A1, Jan. 5, 2023
Int. Cl. G01S 7/41 (2006.01); A61B 5/05 (2021.01); G01H 9/00 (2006.01); G01S 7/295 (2006.01); G01S 13/02 (2006.01)
CPC G01S 7/415 (2013.01) [G01H 9/00 (2013.01); G01S 7/295 (2013.01); G01S 13/0209 (2013.01); A61B 5/05 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for remote recovery of an acoustic signal, the method comprising:
transmitting a radar signal toward a passively vibrating surface that is separated from an indirectly observed active acoustic source;
receiving a radio frequency (RF) response signal corresponding to the radar signal;
extracting a surface motion signal from the RF response signal;
determining spatial information corresponding to the passively vibrating surface from the surface motion signal; and
reconstructing an acoustic signal from the surface motion signal using the spatial information, wherein the acoustic signal originates from the indirectly observed active acoustic source.