Ambient noise correlations on a mobile, deformable array
| Autor: | Paul L. D. Roberts, Riley Yeakle, Philippe Roux, Jules S. Jaffe, Ryan Kastner, Perry Naughton, Curt Schurgers |
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| Rok vydání: | 2017 |
| Předmět: |
Noise temperature
010504 meteorology & atmospheric sciences Acoustics and Ultrasonics Computer science Acoustics Ambient noise level Function (mathematics) 01 natural sciences Power law Gradient noise Noise Amplitude Arts and Humanities (miscellaneous) 0103 physical sciences 010301 acoustics Adaptive beamformer 0105 earth and related environmental sciences |
| Zdroj: | The Journal of the Acoustical Society of America, vol 141, iss 5 The Journal of the Acoustical Society of America, vol 140, iss 6 Naughton, P; Roux, P; Yeakle, R; Schurgers, C; Kastner, R; Jaffe, JS; et al.(2016). Ambient noise correlations on a mobile, deformable array. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 140(6), 4260-4270. doi: 10.1121/1.4971172. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/90w040dg |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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