A digital underwater acoustic sensor system is disclosed. The system can include an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal. The acoustic sensor can include an interior cavity. A digital communication
A digital underwater acoustic sensor system is disclosed. The system can include an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal. The acoustic sensor can include an interior cavity. A digital communication module can be positioned within the interior cavity. The digital communication module comprises an amplifier configured to amplify the analog signal. An analog to digital converter is configured to convert the analog signal to a digital signal. A digital signal transmission module is configured to communicate the digital signal to a receiver.
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1. A digital underwater acoustic sensor system, comprising: an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal, the acoustic sensor having a predetermined size and shape with an interior cavity;a digital comm
1. A digital underwater acoustic sensor system, comprising: an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal, the acoustic sensor having a predetermined size and shape with an interior cavity;a digital communication module positioned within the interior cavity comprising: an amplifier configured to amplify the analog signal;an analog to digital converter configured to convert the analog signal to a digital signal; anda digital signal transmission module; anda non-impedance controlled cable coupled to the digital communication module of the acoustic sensor and a plurality of additional acoustic sensors with each acoustic sensor containing the digital communication module, wherein the digital signal transmission module in each digital communication module is configured to modulate the digital signal onto one of a plurality of orthogonal subcarrier signals to form an orthogonal frequency-division multiplexed signal configured to travel along the non-impedance controlled cable to a receiver. 2. The system of claim 1, wherein the acoustic sensor is selected from the group consisting of a hydrophone, a hydrophone vector sensor, an accelerometer, and combinations thereof. 3. The system of claim 1, wherein the acoustic sensor is comprised of piezoelectric material configured to create the analog signal in response to the underwater acoustic signal. 4. The system of claim 1, wherein the digital signal transmission module is further configured to receive a signal to enable bi-directional communications along the non-impedance controlled cable. 5. The system of claim 1, wherein the non-impedance controlled cable provides in-bound communication signals from each of the acoustic sensors to the receiver and a second cable is connected to each acoustic sensor to provide outbound communication from the receiver to one or more selected digital communication modules. 6. The system of claim 1, further comprising a power supply coupled to the non-impedance controlled cable to provide a voltage source to power the digital communication module. 7. The system of claim 1, further comprising a power cable separate from the non-impedance controlled cable, the power cable configured to provide a voltage source to power the digital communication module coupled to the non-impedance controlled cable. 8. The system of claim 1, further comprising a trunk line coupled to a plurality of the non-impedance controlled cables, the trunk line configured to communicate the orthogonal frequency-division multiplexed signal of each non-impedance controlled cable to the receiver. 9. The system of claim 8, further comprising a data accumulator module connected to each node at a connection point of the non-impedance controlled cable and the trunk line, the data accumulator module configured to received data transmitted along the non-impedance controlled cable and transmit the data along the trunk line. 10. The system of claim 8, wherein at least one of the non-impedance controlled cable and the trunk line is configured to be coupled to the receiver through a hull penetrator in a vessel. 11. A digital underwater acoustic sensor system, comprising: an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal, the acoustic sensor having an interior cavity;a digital communication module positioned within the interior cavity comprising: an amplifier configured to amplify the analog signal;an analog to digital converter configured to convert the analog signal to a digital signal; anda digital signal transmission module configured to communicate the digital signal to a receiver,wherein the digital communication module is contained completely within the interior cavity and the interior cavity is open on one side and filled with a potting material to form a water tight seal around the digital communication module. 12. The system of claim 11, wherein the acoustic sensor is selected from the group consisting of a hydrophone, a hydrophone vector sensor, an accelerometer, and combinations thereof. 13. The system of claim 11, wherein the acoustic sensor is comprised of piezoelectric material configured to create the analog signal in response to the underwater acoustic signal. 14. The system of claim 11, wherein the digital communication module is contained completely within the interior cavity of the acoustic sensor such that the acoustic sensor provides water resistance and pressure resistance for the digital communication module. 15. The system of claim 11, wherein the digital communication module is contained in an enclosure configured to provide at least one of water resistance and pressure resistance and the enclosure is contained within the interior cavity of the acoustic sensor. 16. The system of claim 11, further comprising a cable configured to be connected to a plurality of the acoustic sensors to enable the digital signal to be communicated from the digital signal transmission module of each acoustic sensor to the receiver. 17. A digital underwater acoustic sensor system, comprising: an acoustic sensor configured to detect an underwater acoustic signal and form an analog signal proportional to the underwater acoustic signal;a digital communication module coupled to the acoustic sensor comprising: an amplifier configured to amplify the analog signal;an analog to digital converter configured to convert the analog signal to a digital signal; anda digital signal transmission module configured to communicate the digital signal to a receiver on a vessel; anda module communication cable connecting the digital communication module to the acoustic sensor to communicate the analog signal to the analog to digital converter, wherein the module communication cable has a length that will decrease the Signal to Noise Ratio (SNR) of the analog signal by less than 1 dB; anda non-impedance controlled cable coupled to the digital communication module of the acoustic sensor and a plurality of additional acoustic sensors, with each acoustic sensor coupled to a separate digital communication module through a separate module communication cable, wherein the digital signal transmission module in each digital communication module is configured to modulate the digital signal of the acoustic sensor onto one of a plurality of orthogonal subcarrier signals to form an orthogonal frequency-division multiplexed signal configured to travel along the non-impedance controlled cable to a receiver. 18. The system of claim 17, wherein the acoustic sensor is comprised of piezoelectric material configured to create the analog signal in response to the underwater acoustic signal.
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