Zobrazeno 1 - 10
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pro vyhledávání: '"Homer P. Bucker"'
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 59:368-373
The calculated complex sound field cj for sensor j at depth zj and range rj from a sound source of frequency ω and depth z0 can be written in the normal‐mode form as cj= (2π/rj)1/2 ΣmUm(z0) Um(zj) exp[i (kmrj−ωt)]. Here, km is the horizontal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a9a7cc804adb1868e87353fa93b33f1
https://doi.org/10.1121/1.380872
https://doi.org/10.1121/1.380872
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 62:1222-1225
In cross‐sensor beamforming the narrow‐band quadrature signal at one sensor is multiplied by the complex conjugate of the narrow‐band quadrature signal at a second sensor to form a stable element of the cross‐sensor field. After suitable time
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::903d7207458e8d1f7a5262503d499f2b
https://doi.org/10.1121/1.381636
https://doi.org/10.1121/1.381636
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 61:756-762
Samples of the quadrature field {Fj} collected on a uniform linear array can be quickly analyzed to determine the bearings of targets by use of the FFT or Prony algorithm. These methods are compared for many realizations of a realistic ocean acoustic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8a9cd6c824c31685120632906d7b708
https://doi.org/10.1121/1.381364
https://doi.org/10.1121/1.381364
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 63:420-424
The methods of high‐resolution spectral analysis can be used for high‐resolution cross‐sensor beamforming for a uniform line array. In this paper two high‐resolution techniques (maximum entropy and discrete decomposition) are applied to the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40e8e5903bf2f594488c76739e5d3e58
https://doi.org/10.1121/1.381732
https://doi.org/10.1121/1.381732
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 73:486-491
The split‐step algorithm is the standard method for calculating complex (i.e., amplitude and phase) sound fields in a range dependent ocean environment. However, in ocean areas with strong bottom interaction, density discontinuities, sediment rigid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e91534c380e7c0b5555dbe0c15de3302
https://doi.org/10.1121/1.388983
https://doi.org/10.1121/1.388983
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 61:494-498
By using the cross‐sensor field, a beam pattern (for a one‐wave, no‐noise acoustic field) can be generated for a sparse array which is the same as for a filled array. When real‐world effects, such as noise and multiwave acoustic fields, are c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b76eec8faedad17e96fef5530a57dad
https://doi.org/10.1121/1.381290
https://doi.org/10.1121/1.381290
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 68:1123-1126
This paper examines cross‐sensor processing for a U‐shaped array and for a horizontal line array. Attention is given to accounting for crossterms in the cross‐sensor field (cross‐spectral matrix) caused by doublet (i.e., two multi‐paths) ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75a0ab57d9a1c4716a2b6c696743ca95
https://doi.org/10.1121/1.384994
https://doi.org/10.1121/1.384994
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 68:1768-1772
Scattering integrals are derived that represent the contribution of boundary scattering in a sound channel. These integrals are added to the normal mode sum which represents the coherent field in the channel. A comparison is made between experimental
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c36afb086bdce83ecc7a82840dcbda1
https://doi.org/10.1121/1.385141
https://doi.org/10.1121/1.385141
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 65:906-908
Sound propagation in a uniform duct can be represented as a sum of normal modes plus a branch line integral(s) contribution. In the case of a homogeneous liquid layer lying over a homogeneous liquid half‐space the complex modes exhibit a complicate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58559d9c5b2371d002810f8259d3d482
https://doi.org/10.1121/1.382593
https://doi.org/10.1121/1.382593
Autor:
Homer P. Bucker
Publikováno v:
The Journal of the Acoustical Society of America. 65:145-147
The cross‐sensor field of an array consists of all products of the narrow‐band quadrature signal measured at one sensor multiplied by the complex conjugate of the quadrature signal measured at a second sensor. Three algorithms which use the cross
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad5598583260b517f2c61a4e488383af
https://doi.org/10.1121/1.382256
https://doi.org/10.1121/1.382256