| 摘要 |
The invention relates to incoherent and coherent acquisition methods for driving vibrational source arrays under the water. In one aspect, first and second source arrays 340a-b are activated simultaneously so that incoherent coded driving signals drive the first and second source arrays. Each source array includes a plurality of individual source elements. The signals are incoherent as the source elements of array 340a have a different content from those in 340b. In another aspect, the first and second arrays are high frequency and a plurality of low frequency individual source elements of a low-frequency source array 360a-b are also simultaneously activated so that coherent coded driving signals drive the low frequency source elements. The plurality of individual source elements may be electro-mechanical sources. By operating the sources incoherently, the total energy output is doubled relative to a conventional source array using a flip-flop scheme. By operating them coherently, the output quadruples.
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