|Title||Measuring the effect of ambient noise directionality and split-beam processing on the convergence of the cross-correlation function|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Fried S.E, Walker SC, Hodgkiss WS, Kuperman WA|
|Journal||Journal of the Acoustical Society of America|
|Type of Article||Article|
|Keywords||coherent wave-fronts; emergence; fields; greens-function; ocean; rate; spatial correlation|
Measurements of ambient noise have been used to infer information about the ocean acoustic environment. In recent years the correlation of ambient noise has been shown to give estimates of the travel time of acoustic paths between the sensors recording the noise. A number of issues affect the results of the noise correlation. This paper presents the results of noise correlation of the two horizontally separated arrays of sensors in the 2010 ambient noise experiment. Using the experimental data, the effects on the convergence of the noise correlation are examined with respect to the size and shape of the arrays, the length of time used, and the directionality of the noise field. (C) 2013 Acoustical Society of America.