Patent ID: 11882417
Assignee: THE GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method for providing a broadband constant beam width acoustic array:
receiving user specified shading function parameters for a three dimensional axially symmetric beam;
obtaining a user specified peak power level;
providing an initial number of Legendre polynomial orders;
calculating coefficients for a summation of Legendre polynomial orders that fit the user specified shading function parameters;
determining an axisymmetric null bearing location from the user specified shading function parameters;
creating a constant beam width transducer shading function as a function of axisymmetric bearing as a summation of Legendre polynomial orders with the calculated coefficients, peak power level, and the determined axisymmetric null bearing locations;
providing an array of transducers in a conical spherical configuration with each transducer having an associated bearing and an associated signal; and
modifying a power level of the signal associated with each transducer of the array in accordance with the created constant beam width transducer shading function.