Patent ID: 8139443

Claim:
A method for producing an underwater sound projector system, the method comprising the steps of: providing multiple sound projectors, each sound projector being capable of producing acoustic pressures and having a fundamental resonance frequency; and holding the sound projectors in close proximity such that the sound projectors interact with one another via the acoustic pressures that the projectors produce, wherein the sound projectors are held so that a separation between a sound projector and its nearest neighboring sound projector is less than or equal to a characteristic size of the sound projector, and the separation measured in wavelengths is equal to or less than λ/8, wherein λ is a wavelength of an acoustic wave at a fundamental resonance frequency of the sound projector system, and wherein the sound projectors are held such that the fundamental resonance frequency of the sound projector system is about 80% or lower of the fundamental resonance frequency of each sound projectors when measured in a free field.