1. A loudspeaker array comprising:
at least one digital FIR filter configured to receive a digital audio signal from an audio sound source;
at least one power DA converter configured to receive a filtered signal from the at least one FIR filter, where the at least one digital FIR filter includes linear phase filter coefficients determined for optimized transducer positions; and
a plurality of transducers of at least two different sizes, the plurality of transducers arranged symmetrically about a first axis and about a second axis perpendicular to the first axis at optimized transducer positions determined and optimized using a cost minimization function to determine a minimum difference between a desired performance of the loudspeaker array indicated by a directivity target function and a measured frequency response, the plurality of transducers coupled to the at least one power DA converter.
2. The loudspeaker array of claim 1 where the at least two different sizes of the plurality of transducers are tweeters and midrange drivers.
3. The loudspeaker array of claim 1 where the at least two different sizes of the plurality of transducers are tweeters and woofers.
4. The loudspeaker array of claim 1 where the plurality of drivers include tweeters, midrange drivers and woofers.
5. The loudspeaker array of claim 1 further comprising a center transducer positioned with its center at the intersection of the first and second axis.
6. The loudspeaker array of claim 5 where the center transducer receives a signal from at least one power DA converter that has been filtered through at least one digital FIR filter.
7. The loudspeaker array of claim 1 where the linear phase filter coefficients for each FIR filter is determined by establishing the initial driver positions; establishing the initial directivity target functions for the system; applying the cost minimization function based upon the initial directivity target function; and computing linear phase filter coefficients for each filter in the system.
8. The loudspeaker array of claim 7 where the initial driver positions are coordinates relative to the center of origin of the loudspeaker.
9. The loudspeaker array of claim 7, where frequency points are established on a logarithmic scale with a predetermined frequency range based upon the established initial directivity target functions.
10. The loudspeaker array of claim 7, where the cost minimization function is applied at the frequency points, starting with the lowest frequency increment stepwise.
11. The loudspeaker array of claim 7, where the Fourier approximation method is utilized to establish the linear phase filter coefficients.
12. A loudspeaker system comprising:
at least one digital FIR filter configured to receive a digital audio signal from an audio sound source;
at least one power DA converter configured to receive a filtered signal from the at least one FIR filter, where the at least one digital FIR filter includes linear phase filter coefficients determined for optimized transducer positions; and
at least five transducers of at least two different sizes, four of the at least five transducers symmetrically arranged about both a first axis and a second axis perpendicular to the first axis, and one transducer centered at the intersection of the first and second axes, the symmetrically arranged transducers positioned at optimized transducer positions determined and optimized using a cost minimization function to determine a minimum difference between a desired performance of the loudspeaker array indicated by a directivity target function and a measured frequency response, the plurality of transducers configured to receive an audio signal output from. the at least one power DA converter.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus comprising:
a main pole being configured to be operable to display at least one flag;
at least one illumination source being disposed in a longitudinal length of said main pole, said illumination source being configured to at least illuminate a facing surface of the displayed flag
an inner pole being configured to be disposed longitudinally within said main pole, said inner pole being further configured to be operable to removably retain a longitudinal side of the flag in which at least a remaining portion of the flag is displayed outside said main pole.
2. The apparatus as recited in claim 1, in which said inner pole is further configured to be slidable within a pole-hem of the flag.
3. The apparatus as recited in claim 2, further comprising a member being configured to join to a top end of said inner pole for mitigating slippage of the flag off said top end.
4. The apparatus as recited in claim 2, further comprising at least one spacer being joinable to said inner pole to separate the flag from an addition flag placed on said inner pole.
5. The apparatus as recited in claim 1, further comprising a handle being joined to a bottom portion of said main pole to enable mobility and control by a user.
6. The apparatus as recited in claim 5, further comprising a switch mechanism being configured to be operable for activating and deactivating said illumination source, said switch mechanism being disposed within said handle.
7. The apparatus as recited in claim 1, in which said main pole further comprises an inversed twin trapezoidal cross section comprising two longitudinal trapezoidal channels each comprising a vertical slit being configured to be operable to pass the flag to be displayed, and a centrally located cylindrical hole being configured to house said inner pole.
8. The apparatus as recited in claim 7, in which said at least one illumination source is disposed on a first side and a second side of a first of said two longitudinal trapezoidal channels in which said illumination source is operable to illuminate both sides of the flag passing through said vertical slit of said first longitudinal trapezoidal channel.
9. The apparatus as recited in claim 8, further comprising an additional illumination source being disposed on a first side and a second side of a second of said two longitudinal trapezoidal channels in which said illumination source is operable to illuminate both sides of the flag passing through said vertical slit of said second longitudinal trapezoidal channel.
10. The apparatus as recited in claim 9, further comprising a selection switch mechanism being dispose on a handle, said handle being joined to a bottom portion of said main pole, said selection switch mechanism being configured to be operable for selectively activating and deactivating combinations of said illumination source and said additional illumination source.
11. The apparatus as recited in claim 5, in which said handle further comprises security mechanisms to enable secure placement of the apparatus into at least one of a vehicle mount, wall mount, table mount, and chair mount.
12. The apparatus as recited in claim 1, further comprising a handle being joined to a bottom portion of said main pole being configured to enable mobility and control by a user, in which said handle comprises a security mechanism configured to enable secure placement of the apparatus into at least one of a vehicle mount, wall mount, table mount, and chair mount.
13. The apparatus as recited in claim 9, in which said illumination source and said additional illumination source comprise LED lights.
14. An apparatus comprising:
means being configured to be operable for displaying at least one flag;
means for illuminating surfaces of the flag, said means being disposed in a longitudinal length of said displaying means;
means being configured to be operable for activating and deactivating said illuminating means;
means being configured to be disposed longitudinally within said displaying means for removably retaining a longitudinal side of the flag in which at least a remaining portion of the flag is displayed outside said displaying.
15. The apparatus as recited in claim 14, further comprising means being configured to join to a top end of said retaining means for mitigating slippage of the flag off said top end.
16. The apparatus as recited in claim 14, further comprising means being joinable to said retaining means for separating the flag from an addition flag placed on said retaining means.
17. The apparatus as recited in claim 14, further comprising means for enabling mobility and control by a user disposed on a proximate bottom portion of said displaying means, in which said means for activating and deactivating said illuminating means is disposed to a proximate top portion of said mobility and control enabling means.
18. An apparatus comprising:
a main pole being configured to be operable to display at least one flag, said main pole comprising an inversed twin trapezoidal cross section comprising two longitudinal trapezoidal channels each comprising a vertical slit being configured to be operable to pass the flag to be displayed, and a centrally located cylindrical hole;
an inner pole being configured to be disposed longitudinally within said cylindrical hole, said inner pole being further configured to be slidable within a pole-hem of the flag to removably retain a longitudinal side of the flag in which at least a remaining portion of the flag is displayed outside said main pole;
a member being configured to join to a top end of said inner pole for mitigating slippage of the flag off said top end;
at least one spacer being joinable to said inner pole to separate the flag from an addition flag placed on said inner pole;
a first LED illumination source being disposed on a first side and a second side of a first of said two longitudinal trapezoidal channels in which said first LED illumination source is operable to illuminate both sides of the flag passing through said vertical slit of said first longitudinal trapezoidal channel;
a second LED illumination source being disposed on a first side and a second side of a second of said two longitudinal trapezoidal channels in which said second LED illumination source is operable to illuminate both sides of the flag passing through said vertical slit of said second longitudinal trapezoidal channel;
a handle being joined to a bottom portion of said main pole to enable mobility and control by a user, said handle comprising security mechanisms for enabling secure placement of the apparatus into a mount;
a switch mechanism being disposed within said handle, said switch mechanism being configured to be operable for activating and deactivating said illumination source; and
a selection switch mechanism being dispose on said handle, said selection switch mechanism being configured to be operable for selectively activating and deactivating combinations of said first LED illumination source and said second LED illumination source.