Methods, systems and apparatus for measuring acoustic pressure

Details Methods, systems and apparatus for measuring acoustic pressure Methods, systems and apparatus for measuring acoustic pressure

2011-06-28

2011-06-28

Lobo, Ian J (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

C073S655000, C356S477000

Reexamination Certificate

active

07969823

ABSTRACT:
A hydrophone (10) for immersion in a liquid body defining a pressure is disclosed The hydrophone (10) includes a sensor (11) for providing an electrical signal indicative of the pressure; and a transducer (12) electrically connected to the sensor (11). The transducer (12) acts upon a fiber optic cable (15) so as to convert the electrical signal into a corresponding optical output signal for transmission within the fiber optic cable (15). The liquid body defines a depth-dependent static pressure and a dynamic pressure and the sensor (11) provides an electrical signal having a first component indicative of the static pressure and a second component indicative of the dynamic pressure. A filter (16) is electrically connected to the sensor (11) so as to receive (the electrical signal, filter out the first component, and output to the transducer (12) a uttered electrical signal indicative of substantially only the second component.

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