|Title||Cross-correlation sensitivity kernels with respect to noise source distribution|
|Publication Type||Journal Article|
|Year of Publication||2020|
|Authors||Skarsoulis E.K, Cornuelle BD|
|Type of Article||Article|
|Keywords||acoustics; ambient noise; Audiology & Speech-Language Pathology; coherent wave-fronts; emergence rate; fields; greens-function; interferometry; ocean; spatial-correlation functions|
The cross correlation of the underwater noise field recorded at two receivers conveys information about the time-domain Green's function between the two locations, provided that sufficient energy is channeled into the acoustic paths connecting these. The efficiency of this procedure depends on the locations and characteristics of the receivers and noise sources, as well as on the refraction properties of the ocean sound channel. The sensitivity of the finite-frequency noise cross-correlation function with respect to the location and amplitude of the noise sources is studied here, taking into account the refractive features of the ocean environment. The sensitivity kernel describing changes in the cross-correlation envelope due to changes in the noise source distribution is used to highlight noise-source locations with maximum potential impact on the cross-correlation output.