title: Synthetic array processing of ocean ambient noise for higher resolution seabed bottom loss estimation.
abstract: Predicting transmission loss in the ocean often strongly depends on the bottom loss. Bottom loss can be estimated using ocean noise and vertical array beam-forming [Harrison and Simons, J. Acoust. Soc. Am. 112, 1377-1389 (2002)]. With finite length arrays, the bottom loss estimate using this method can be smoothed due to beam widths. This paper describes how the noise coherence function can be synthetically expanded, which is similar to extending the length of an array. A full wave ocean noise model is used to demonstrate, in simulation, how this leads to improvements in the resolution of bottom loss estimates.
authors: Department of Electrical and Computer Engineering, Portland State University, Portland, Oregon 97201, USA. siderius@pdx.edu
authors: Martin
authors: M
authors: Siderius
authors: Lanfranco
authors: L
authors: Muzi
authors: Chris H
authors: CH
authors: Harrison
authors: Peter L
authors: PL
authors: Nielsen
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D003198:Computer Simulation; D005583:Fourier Analysis; D019015:Geologic Sediments; D008962:Models, Theoretical; D009038:Motion; D009792:Oceans and Seas; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013997:Time Factors; D014160:Transducers, Pressure; D014867:Water
chemical_list: D014867:Water