title: Ambient noise correlations on a mobile, deformable array.
abstract: This paper presents a demonstration of ambient acoustic noise processing on a set of free floating oceanic receivers whose relative positions vary with time. It is shown that it is possible to retrieve information that is relevant to the travel time between the receivers. With thousands of short time cross-correlations (10 s) of varying distance, it is shown that on average, the decrease in amplitude of the noise correlation function with increased separation follows a power law. This suggests that there may be amplitude information that is embedded in the noise correlation function. An incoherent beamformer is developed, which shows that it is possible to determine a source direction using an array with moving elements and large element separation. This incoherent beamformer is used to verify cases when the distribution of noise sources in the ocean allows one to recover travel time information between pairs of mobile receivers.
authors.affiliation: Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
authors.forename: Perry
authors.initials: P
authors.lastname: Naughton
authors.affiliation: ISTerre, Université de Grenoble Alpes, CNRS, 38000 Grenoble, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Roux
authors.affiliation: Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
authors.forename: Riley
authors.initials: R
authors.lastname: Yeakle
authors.affiliation: Qualcomm Institute, Calit2, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
authors.forename: Curt
authors.initials: C
authors.lastname: Schurgers
authors.affiliation: Department of Computer Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
authors.forename: Ryan
authors.initials: R
authors.lastname: Kastner
authors.affiliation: Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0238, USA.
authors.forename: Jules S
authors.initials: JS
authors.lastname: Jaffe
authors.affiliation: Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0238, USA.
authors.forename: Paul L D
authors.initials: PL
authors.lastname: Roberts