Method and system of mapping acoustic near field
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsJoseph A. Clark, Michael A. Sartori
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Abstract
A method and system for mapping the acoustic near field of a stationary al symmetric structure are provided. The structure is subjected to a rotating excitation energy profile from a plurality of stationary excitation sites located radially around the structure. The acoustic near field of the structure due to the rotating excitation energy profile is measured along at least one line that conforms to a longitudinal surface of the structure. Mapping of the acoustic near field is complete when one rotation of the rotating excitation energy profile is complete.
Claims16
A method of mapping the acoustic near field of an axial symmetric structure, comprising the steps of:
- generating a set of repeatable excitation signals for transmission over a corresponding set of channels;
- converting each repeatable excitation signal from said set of repeatable excitation signals to excitation energy at an excitation source site from a corresponding set of excitation source sites located radially around said structure;
- measuring the acoustic near field of said structure due to said excitation energy along a line that conforms to a longitudinal surface of said structure;
- and
- repeating said steps of converting and measuring as said set of repeatable excitation signals is incrementally shifted around said set of excitation source sites, wherein said mapping of the acoustic near field is complete when each said excitation source site has produced said excitation energy corresponding with each said repeatable excitation signal.
A method of mapping the acoustic near field of an axial symmetric structure, comprising the steps of:
- providing a plurality of excitation signals;
- subjecting said structure to excitation energy based on said excitation signals at a plurality of stationary excitation sites located radially around said structure;
- and
- measuring the acoustic near field of said structure due to said excitation energy along a line that conforms to a longitudinal surface of said structure, wherein said step of measuring takes place as each of said plurality of excitation signals is incrementally provided to each of said plurality of stationary excitation sites and wherein said mapping of the acoustic near field is complete when each of said plurality of excitation signals has been provided to each of said plurality of stationary excitation sites.
A method of mapping the acoustic near field of a stationary axial symmetric structure, comprising the steps of:
- subjecting said structure to a excitation energy profile, which rotates from a plurality of stationary excitation sites located radially around said structure;
- and
- measuring the acoustic near field of said structure due to said rotating excitation energy profile along at least one line that conforms to a longitudinal surface of said structure, wherein said mapping of the acoustic near field is complete when one rotation of said rotating excitation energy profile is complete.
A system for mapping the acoustic near field of an axial symmetric structure, comprising:
- means for subjecting said structure to a excitation energy profile, which rotates from a plurality of stationary excitation sites located radially around said structure;
- and
- means for measuring the acoustic near field of said structure due to said rotating excitation energy profile along at least one line that conforms to a longitudinal surface of said structure, wherein said mapping of the acoustic near field is complete when one rotation of said rotating excitation energy profile is complete.
Dependencies are inferred from the claim text.