title: Frequency-wavenumber processing for infrasound distributed arrays.
abstract: The work described herein discusses the application of a frequency-wavenumber signal processing technique to signals from rectangular infrasound arrays for detection and estimation of the direction of travel of infrasound. Arrays of 100 sensors were arranged in square configurations with sensor spacing of 2 m. Wind noise data were collected at one site. Synthetic infrasound signals were superposed on top of the wind noise to determine the accuracy and sensitivity of the technique with respect to signal-to-noise ratio. The technique was then applied to an impulsive event recorded at a different site. Preliminary results demonstrated the feasibility of this approach.
authors.affiliation: U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, Mississippi 39180-6199 dan.costley@usace.army.mil.
authors.forename: R Daniel
authors.initials: RD
authors.lastname: Costley
authors.forename: W Garth
authors.initials: WG
authors.lastname: Frazier
authors.forename: Kevin
authors.initials: K
authors.lastname: Dillion
authors.forename: Jennifer R
authors.initials: JR
authors.lastname: Picucci
authors.forename: Jay E
authors.initials: JE
authors.lastname: Williams
authors.forename: Mihan H
authors.initials: MH
authors.lastname: McKenna
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D003198:Computer Simulation; D004867:Equipment Design; D005240:Feasibility Studies; D009038:Motion; D009622:Noise; D009716:Numerical Analysis, Computer-Assisted; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D013018:Sound Spectrography; D013997:Time Factors; D014159:Transducers; D014919:Wind