Multi-mode pipe projector
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence
InventorsChristopher John A. Purcell, Richard A. Fleming
Life of this patent
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Abstract
An underwater acoustic projector comprising a pair of spaced apart end plates with an acoustic driver positioned between the end plates, the driver having smaller cross-sectional dimensions than the end plates. Each end plate close one end of an open ended tubular pipe waveguide and that plate is mechanically connected to one end of a piezoelectric drive unit with a tubular waveguide extending inwards and surrounding the end portion of the acoustic driver.
Claims17
An acoustic projector comprising a pair of spaced apart end plates with an acoustic driver positioned between and coupled to the end plates, the driver having smaller cross-sectional dimensions than the end plates which have tubular pipe waveguides extending inwards and surrounding end portions of said driver, ends of said waveguides opposite said end plates being open and spaced apart.
An acoustic projector comprising a pair of spaced apart end plates with an acoustic driver positioned between and coupled to the end plates, the driver having smaller cross-sectional dimensions than the end plates, at least one end plate having a tubular pipe waveguide extending towards and surrounding an end portion of the said driver.
An acoustic projector comprising a pair of spaced apart end plates with an acoustic driver positioned between and coupled to the end plates, the driver having smaller cross-sectional dimensions than the end plates which have tubular pipe waveguides extending towards and surrounding end portions of said driver, ends of said waveguides opposite said end plates being spaced apart and sealed with a polymer membrane, the waveguide being filled with a fluid having a lower sound speed than the surrounding medium.
Dependencies are inferred from the claim text.